unflappable, adj.
not easily perturbed or excited or upset; marked by extreme calm and composure
<adj.all>
imperturbable unflappable
<adj.all>
imperturbable unflappable
sample sentences
"hitherto imperturbable, he now showed signs of alarm""an imperturbable self-possession"
"unflappable in a crisis"
lexical pointers
derivationally related form
semantic pointers
similar to