clever, bright; adaptable; handy, adroit, dexterous, skillful. 4.
fitting, meet, germane, felicitous. Apt, pertinent, relevant all refer to something suitable or fitting. Apt means to the point and particularly appropriate: an apt comment.
Pertinent means pertaining to the matter in hand: a pertinent remark.
Relevant means directly related to and important to the subject: a relevant opinion.