imperturbable
calm and not easily disturbed
Roots
- -able / -ible: able to be, fit to be, or worthy of
- im- / in- (not): not or without
- per-: through, thoroughly, or completely
- turb: stir, disturb, throw into disorder, or make cloudy
Other words with the turb root
Imperturbable means not stirred into disorder: pressure arrives, but the person stays steady.
The interviewer remained imperturbable even when the projector failed and the room went dark.