imperturbable
- adjective (adj)
Meaning: calm, collected
Synonyms:
assured
complacent
composed
cool
cool as cucumber
disimpassioned
equanimous
hard as nails
immovable
nerveless
nonchalant
roll with punches
sedate
self-possessed
selfsatisfied
smug
stiff upper lip
stoical
thickskinned
tranquil
unaffected
undisturbed
unexcitable
unflappable
unmoved
unruffled
untouched
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.