piquant

adjective

1. agreeably pungent or sharp in taste or flavor; pleasantly biting or tart: a piquant aspic.
2. agreeably stimulating, interesting, or attractive: a piquant glance.
3. of an interestingly provocative or lively character: a piquant wit.
4. Archaic. sharp or stinging, especially to the feelings.

adjective

1. having an agreeably pungent or tart taste
2. lively or stimulating to the mind

adj.1520s, from Middle French piquant “pricking, stimulating, irritating,” present participle of piquer “to prick, sting, nettle” (see pike (n.2)).