A word or expression capable of different meanings; an ambiguous term.
Having two or more equally applicable meanings; capable of double or multiple interpretation.
Capable of being ascribed to different motives, or of signifying opposite feelings, purposes, or characters; deserving to be suspected.
Uncertain, as an indication or sign.
Without doubt, certainly.
Yes, expressing noncommittal agreement or consent.
Yes; of course.
You're welcome; polite response to being thanked.
Physically secure and certain, non-failing, reliable.
Certain to act or be a specified way.
Certain in one's knowledge or belief.