merciless
gb/mˈɚsələs/ us/mˈɚsələs/
B2
English
~ 9500
Senses
0 senses
adjective
B2
property
1
Showing no mercy or pity
Not showing any kindness or pity to other people.
Usage pattern:
[someone] is merciless (to/toward [someone])
Common mistake:
Learners sometimes use "merciless" when they only mean "strict". "Merciless" is stronger and suggests being very cruel, with no pity, not just following rules carefully. Also, do not say "more merciless" in most cases; use "even more cruel" instead, or just "absolutely merciless".
Synonyms
cruel (General word for causing pain or suffering without caring; slightly more common and basic than "merciless".)
|
ruthless (Stresses doing whatever is needed to succeed, with no concern for others' feelings; often used in business or competition.)
|
pitiless (Very close in meaning; slightly more literary and strongly emphasizes the total lack of pity.)
Antonyms
merciful (Direct opposite; stresses showing kindness or forgiveness when you could be harsh.)
|
compassionate (Focuses on feeling and showing sympathy for others’ suffering, the emotional opposite of being merciless.)
|
lenient (Opposite in contexts of punishment or discipline, meaning not as strict or harsh as you could be.)
Collocations
a merciless killer
|a merciless dictator
|merciless attack
|merciless beating
|merciless bullying
|merciless war
Themes
emotions
|conflict
|character
|relationships
|core_vocabulary
Examples
- The merciless guards laughed as the prisoners begged for water.
- Online trolls launched a merciless campaign against the young actor.
- The coach was merciless with players who showed a bad attitude.
- A merciless dictator crushed any sign of protest in the country.
- Her merciless questioning left the witness shaken and exhausted.
Learner examples
- The teacher was not merciless; she gave the students another chance.
- The soldier was merciless and showed no pity to his enemies.
- The boss can be merciless when employees are late.
- The bully was merciless and hurt the younger kids every day.
adjective
B2
property
2
Extremely harsh and relentless
Very strong and harsh in a way that does not stop or give relief, for example heat, work, or pressure.
Usage pattern:
merciless [weather/pressure/heat/schedule]
Common mistake:
Learners sometimes confuse this sense with the personal, "cruel" sense and avoid using it for weather or schedules. In modern English it is common and natural to call things like heat, pressure, or competition "merciless" to show they are very harsh and do not let you rest.
Synonyms
relentless (Very close meaning; stresses that something never stops or eases up.)
|
harsh (Less strong and more general; can describe many unpleasant conditions, not always as extreme as "merciless".)
|
brutal (Informal but common; suggests very severe or painful conditions, similar emotional strength to "merciless".)
Antonyms
mild (Opposite when talking about weather or levels of difficulty; suggests gentle and not strong.)
|
gentle (Opposite when talking about treatment or conditions that are soft, kind, or not severe.)
Collocations
merciless heat
|merciless sun
|merciless schedule
|merciless workload
|merciless pressure
|merciless pace
Themes
weather
|work
|difficulty
|core_vocabulary
Examples
- We walked for hours under the merciless heat of the desert sun.
- The exam schedule is merciless, with no breaks between the toughest tests.
- Start‑ups face merciless competition in the tech industry.
- The deadline was merciless, forcing the team to work through the night.
- Years of merciless pressure finally caused him to burn out.
Learner examples
- We worked all day in merciless heat.
- The students face merciless pressure before the final exam.
- The company has a merciless schedule during the busy season.
- The sun was merciless and there was no shade.
Grammar
Dictionary form
merciless
IPA
GB/mˈɚsələs/
US/mˈɚsələs/
Syllables & stress
mer - ci - less (3 syllables)
Stress on 1st syllable (mer)
Word forms
Adjective
- Base: merciless
Word family
Expressions
merciless attack
1/mˈɚsələs ətˈæk/
fixed phrase
A very brutal attack
An attack that is very violent and gives no chance for the other side to escape or rest.
Examples
- The village was destroyed in a merciless attack at dawn.
- The team launched a merciless attack on their opponent’s weak defense.
merciless criticism
1/mˈɚsələs kɹˈɪtɪsˌɪzəm/
fixed phrase
Extremely harsh criticism
Very strong and harsh comments about someone or something, with no kindness or softness.
Examples
- The movie received merciless criticism from reviewers.
- After his mistake, he faced merciless criticism on social media.
merciless heat
1/mˈɚsələs hˈit/
fixed phrase
Extremely strong, harsh heat
Heat that is very strong and does not let you feel cool or comfortable.
Examples
- We tried to work in the field despite the merciless heat.
- Tourists hid in cafés to escape the merciless heat of the afternoon sun.