slightest

even a minimal level of curiosity or concern

a very small amount of doubt or distrust

a very subtle clue or indication

any small, often insignificant, event or detail

a very subtle implication or hint

any minor reason, often to justify an action

the smallest amount of support or praise

the smallest possible amount (often with 'of evidence', 'of doubt')

a slight, vague idea or suspicion

the weakest possible reason or defense