reef
gb/ɹˈif/ us/ɹˈif/
B1
อังกฤษ
~ 8400
zátony, reffel, reff, telér
คำนาม
B1
1
zátony
B2
รูปแบบการใช้:
a reef off [a coast]
The divers spent the morning exploring the colorful reef just off the island.
A búvárok egész délelőtt a sziget mellett húzódó színes zátonyt fedezték fel.
The ship changed course to avoid hitting the reef near the harbor entrance.
A hajó irányt változtatott, hogy ne fusson rá a kikötő bejáratánál lévő zátonyra.
Climate change is causing serious damage to the world’s coral reef ecosystems.
Tourists come here to snorkel above the reef and watch the tropical fish.
ตัวอย่างสำหรับผู้เรียน
We went snorkeling over a coral reef.
Pipával búvárkodtunk egy korallzátony fölött.
Many small fish live in the reef.
Sok apró hal él a korallzátonyon.
The boat turned to stay away from the reef.
The Great Barrier Reef is in Australia.
ข้อผิดพลาดที่พบบ่อย:
Learners sometimes confuse "reef" with "wreath" (a ring of flowers). A reef is connected with the sea and is usually long and narrow, not ring-shaped. Another mistake is using "reef" for any underwater mountain; a reef is specifically close to the surface and can be a danger to boats.
ความหมาย
underwater ridge of rock or coral
คำที่ใช้ร่วมกัน
coral reef
|barrier reef
|Great Barrier Reef
|reef system
|reef fish
|reef ecosystem
คำพ้องความหมาย
shoal (A general term for a shallow area in a body of water; does not always suggest rock or coral like reef does.)
|
coral formation (Emphasizes that the reef is mainly made of coral organisms rather than rock or sand.)
คำตรงข้าม
open sea (Refers to deep, unobstructed water, without ridges of rock or coral near the surface.)
หัวข้อ
nature
|geography
|environment
|travel
คำจำกัดความ
A line of rocks, coral, or sand just under the surface of the sea, often where people dive or where ships must be careful.
A long, narrow ridge of rock, coral, or sand that rises close to the surface of the sea and can be seen or reached from the water above it.
คำกริยา
C2
TECHNICAL
2
reffel
C2
รูปแบบการใช้:
to reef [a sail]
As the wind picked up, the skipper ordered the crew to reef the mainsail.
Ahogy erősödött a szél, a kormányos utasította a legénységet, hogy reffeljék a nagyvitorlát.
You should reef early rather than wait until the boat is overpowered.
Érdemes időben reffelni, nem pedig megvárni, amíg a hajó túlvitorlázottá válik.
They quickly reefed the headsail before the squall hit.
ตัวอย่างสำหรับผู้เรียน
The captain tells the crew to reef the sail.
A kapitány azt mondja a legénységnek, hogy reffeljék a vitorlát.
We reefed the mainsail when the wind became strong.
Lereffeltük a nagyvitorlát, amikor megerősödött a szél.
If the boat leans too much, you must reef the sails.
ข้อผิดพลาดที่พบบ่อย:
Learners may think "reef" as a verb is related to coral reefs, but in sailing it only refers to changing the size of a sail. It cannot be used for underwater rocks in verb form.
ความหมาย
make a sail smaller in area
คำที่ใช้ร่วมกัน
reef the mainsail
|reef the sails
|reef down
|reef early
|reef quickly
คำพ้องความหมาย
shorten (In sailing, "shorten sail" has a similar meaning but is slightly more general; "reef" is the specific action of tying or rolling the sail at its reef points.)
คำตรงข้าม
unreef (Means to undo a reef, returning the sail to its larger size.)
หัวข้อ
transport
|hobbies
|travel
|transportation
คำจำกัดความ
To make a sail smaller by tying or rolling part of it, so the boat is safer in strong wind.
To reduce the area of a sail exposed to the wind by tying or rolling part of it so that a boat can be handled more safely in strong wind.
คำนาม
C2
TECHNICAL
3
reff
C2
รูปแบบการใช้:
a reef in [a sail]
We put one reef in the mainsail before leaving the harbor.
A kikötő elhagyása előtt egy reffre vettük a nagyvitorlát.
With two reefs in the sail, the yacht handled the gale comfortably.
Két reffel a vitorlában a jacht gond nélkül bírta a vihart.
The sailmaker added extra reef points so they could take a third reef if needed.
ตัวอย่างสำหรับผู้เรียน
There is one reef in the mainsail.
Egy reff van a nagyvitorlában.
They took in a reef when the wind grew stronger.
Amikor erősödött a szél, behúztak egy reffet.
We will shake out the reef when the weather is calm.
ข้อผิดพลาดที่พบบ่อย:
Learners may confuse this meaning with the underwater feature. In sailing, "a reef" inside a sail refers to a foldable part of the cloth, not rocks or coral in the sea.
ความหมาย
foldable part of a sail
คำที่ใช้ร่วมกัน
take in a reef
|tie in a reef
|shake out a reef
|put a reef in the mainsail
คำพ้องความหมาย
reef band (A more technical term focusing on the reinforced strip of cloth where the sail is reefed.)
คำตรงข้าม
full sail (Describes the opposite state, when no reefs are taken in and the entire sail is set.)
หัวข้อ
transport
|hobbies
|travel
|transportation
คำจำกัดความ
A part of a sail that you can fold and tie to make the sail smaller in strong wind.
A horizontal band or section of a sail that can be folded and tied in to reduce the sail’s exposed area in strong winds.
คำนาม
C2
TECHNICAL
4
telér
C1
รูปแบบการใช้:
a reef of [gold/quartz]
Prospectors discovered a rich gold reef running beneath the hillside.
Az aranyásók a domboldal alatt húzódó gazdag aranytelért fedeztek fel.
The mine was built along a narrow quartz reef that extended for several kilometers.
A bányát egy keskeny, több kilométeren át húzódó kvarctelér mentén nyitották.
Many towns in the region grew up around the old gold reefs.
ตัวอย่างสำหรับผู้เรียน
The miners found a gold reef under the ground.
A bányászok aranytelért találtak a föld alatt.
This reef has a lot of quartz in it.
Ebben a telérben sok kvarc van.
The town started after people found a rich reef nearby.
ข้อผิดพลาดที่พบบ่อย:
This meaning is easy to confuse with the sea meaning. In mining, a reef is inside the ground, not in the water, and normally refers to a line of rock containing metal or minerals.
ความหมาย
ore-bearing rock layer underground
คำที่ใช้ร่วมกัน
gold reef
|quartz reef
|rich reef
|reef mining
คำพ้องความหมาย
vein (A common general term for a narrow deposit of ore; "reef" is more regional and often used in South African and Australian contexts.)
คำตรงข้าม
barren rock (Rock that does not contain valuable minerals, opposite of an ore-rich reef.)
หัวข้อ
science
|industry
คำจำกัดความ
In mining, a long line of rock in the ground that has a lot of metal or other valuable minerals in it.
In mining and geology, a long, narrow layer or line of rock within the earth that contains a high concentration of valuable minerals such as gold or quartz.
ไวยากรณ์
รูปคำในพจนานุกรม
reef
IPA
GB/ɹˈif/
US/ɹˈif/
พยางค์และการเน้นเสียง
reef (1 พยางค์)
Stress on 1st syllable (reef)
รูปคำ
Noun
- Base: reef
- Plural: reefs
Verb
- Base: reef
- 3rd Person Singular: reefs
- Present Participle: reefing
- Past: reefed
กลุ่มคำที่เกี่ยวข้อง
Forms
reefs
noun
reefing
verb
reefed
verb
Related words
coral
noun B2
วลีและสำนวน
barrier reef
1/bˈɛɹiɚ ɹˈif/
fixed phrase
long reef parallel to a coast
A long coral reef that runs roughly along a coast but is separated from the land by deeper water.
ตัวอย่าง
- The small islands sit between the mainland and the outer barrier reef.
- Scientists are studying how warming oceans affect the world’s barrier reefs.
Great Barrier Reef
1/ɡɹˈeɪt bˈɛɹiɚ ɹˈif/
fixed phrase
large reef system in Australia
A very large coral reef system in the sea near northeast Australia; it is the biggest coral reef system in the world.
ตัวอย่าง
- Millions of tourists visit the Great Barrier Reef every year.
- The Great Barrier Reef has suffered repeated coral bleaching events.
reef on [something]
1/ɹˈif ˈɔn sˈʌmθɪŋ/
phrasal verb
informal
pull or twist forcefully
To pull, push, or twist something very hard, usually with your hands.
ตัวอย่าง
- He reefed on the stuck door handle until it finally opened.
- Don’t reef on the steering wheel or you’ll break it.
take in a reef
1/tˈeɪk ˈɪn ə ɹˈif/
idiom
technical
make a sail smaller
To make a sail smaller by folding and tying part of it, so the boat can sail more safely in strong wind.
ตัวอย่าง
- The skipper decided to take in a reef before heading out of the bay.
- If the wind increases, we’ll take in a reef in the mainsail.
coral reef
1/kˈɔɹəl ɹˈif/
fixed phrase
large underwater ridge of coral
A big line or area under the sea made from many pieces of coral growing together.
ตัวอย่าง
- The coral reef near the island attracts thousands of tourists every year.
- Snorkeling over a coral reef, we saw bright fish of every color.
- Coral reef ecosystems are very sensitive to changes in water temperature.
- Coral reef conservation has become a major environmental priority.