IPA: //ˈtræŋkwɪl//
KK: /ˈtræŋkwɪl/
Calm and peaceful, without any disturbance or agitation.
The lake was tranquil in the early morning light.
Comparative: more tranquil
Superlative: most tranquil
Tranquil → It is formed from "tranquillus" (meaning calm or quiet) in Latin. The word "tranquil" means free from disturbance; calm and peaceful.
Think of the Latin word for calm, 'tranquillus', to remember that 'tranquil' describes a state of peace and calmness.