лихой

Etymology
, from.

Adjective

 * 1) evil, hard, sinister
 * 2) valiant, intrepid, bold, daring
 * 3) dashing, gallant
 * 4) nimble
 * 5) smart
 * 6) criminal, delinquent

Usage notes

 * Per Zaliznyak, the comparative is rare and awkward.