BRISK

adj. & v.

--adj.

1. quick, lively, keen (a brisk pace; brisk trade).

2 enlivening (a brisk wind).

--v.tr. & intr. (often foll. by up) make or grow brisk.

Derivatives:

brisken v.tr. & intr. briskly adv. briskness n.

Etymology: prob. F brusque BRUSQUE