Akademik

underhand
1. adjective /ˌʌn.də(r)ˈ(h)ænd/
a) dishonest and sneaky; done in a secret or sly manner
b) (in various ball games, of a ball) thrown etc with the hand brought forward and up from below
2. adverb /ˌʌn.də(r)ˈ(h)ænd/
a) with an underhand movement
b) in a sly, sneaky or secret manner

Wikipedia foundation.