piquancy

noun

1. (countable, uncountable)The degree to which something is piquant, stimulating or exciting.

   “At fifteen, her poetry of feeling (you see I do my best to please you with a phrase) would just give piquancy and freshness to her entry into life; but at twenty,...”

   “There was a certain playfulness about her too, such a piquancy or ironic suggestion, such an untouched reserve.”