Part of speech:
Serenely self-possessed; calm:
The definition of tranquil is someone or something that is calm and peaceful.
The definition of placid is calm or quiet.
(Of water) with little waves on the surface.
free from emotional agitation or nervous tension; ; - Anthony Trollope
Not agitated emotionally; calm:
Find another word for unperturbed. In this page you can discover 8 synonyms, antonyms, idiomatic expressions, and related words for unperturbed, like: composed, tranquil, placid, calm, undisturbed, unflurried, unflustered and unruffled.