tranquil
/ˈtɹeɪ̯ŋ.kwɪl/ adjective
Forms tranquiler tranquilest
Synonyms
calm peaceful serene steady collected composed cool-headed equable equanimous equanimitable even-keeled even-minded even-tempered imperturbable laid-back level-headed mellow pacate pacific peaceable placid quiet still smooth unruffled unagitated
Antonyms
Etymology
Borrowed from Middle French tranquille, from Latin tranquillus, from trāns- + the root of quiēs (“rest, quiet, peace”), ultimately from *kʷyeh₁- (“to rest”).
Webster’s 1913
- adjective Quiet; calm; undisturbed; peaceful; not agitated; as, the atmosphere is tranquil; the condition of the country is tranquil.
Etymology [L. tranquillus; probably fr. trans across, over + a word akin to quietus quiet: cf. F. tranquille. See Quiet.]
Sources: Wiktionary · WordNet 3.0 · Webster’s 1913 — from the Wiktionary entry “tranquil”, CC BY-SA 4.0. Details