Basic words related to grammar and dictionaries

Thesaurus: A thesaurus is a book or online tool that helps you find synonyms (words with the same or similar meanings) and antonyms (words with opposite meanings). For example, if an English learner is looking for words similar in meaning to "happy," the thesaurus will show that "joyful," "content," and "cheerful" are synonyms.

Synonym: A synonym is a word that has a similar or identical meaning to another word. For example, the synonyms for "big" include "large" and "huge." Synonyms can help expand your vocabulary and make your speech or writing more varied.

Etymology: Etymology is the study of the origins and development of words. It shows how a particular word has evolved over time and how it is related to words from other languages. For example, the word "etymology" is of Greek origin, derived from the words "etumos" (true) and "logos" (study).

Lemma: A lemma is the base form of a word as it appears in dictionaries or databases. For example, "run" is the lemma for the words "running," "ran," and "runs." The lemma helps dictionary users find and understand all the forms and meanings of a word.