적절해요 · 적절했어요 · 적절한 (+noun)
appropriate, proper, fitting
Example
상황에 적절한 말을 하는 것이 중요해요.
It's important to say what fits the situation.
Word parts
적 suit+절 fitting
Literally 'suitable and fitting'.
Good to know
적절하다 means exactly appropriate; 적당하다 leans toward 'moderate, about right'.