Origin of imperturbableLate Latin imperturbabilis: see in-, perturb, -able
The definition of imperturbable is someone that is not easily upset, angered or affected.
A level-headed person who doesn't generally get upset by things is an example of someone who is imperturbable.
Unshakably calm and collected: “His … facial expression never deviated from the imperturbable mask” ( Molly Worthen ) See Synonyms at cool.
- im′per·turb′a·bil′i·ty im′per·turb′a·ble·ness
From Middle French imperturbable
- With her imperturbable calm she did not begin to speak in front of the valet.
- It is not too much to say that his imperturbable equanimity, his serene bonhomie kept the host together.
- During this time he went from one city to the other, according as the danger was more pressing, and constantly displayed an admirable zeal and an imperturbable energy.
- Annoyed by Whitworth's imperturbable demeanour, he ended with these words: "You must respect treaties, then: woe to those who do not respect treaties.
- His prudent reserve and imperturbable calmness were branded as stiffness and haughtiness.