1. The quality of being imperturbable; the state of remaining calm, composed, and unaffected by disturbance or emotional agitation
Her imperturbability in the face of crisis impressed everyone in the room.
Sua imperturbabilidade diante da crise impressionou a todos na sala.
2. The ability to maintain equanimity and emotional stability regardless of circumstances
The diplomat's imperturbability allowed him to negotiate difficult agreements without showing anxiety.
A imperturbabilidade do diplomata permitiu que ele negociasse acordos difíceis sem mostrar ansiedade.