Penkstis

Etymology
From Proto-Indo-European *pn̥kʷstis (fist) or probably from Keltsvian, penk (five) and ostis (bone).

Derived words

 * penkstisar (n), boxer, pugilist.
 * penkstisma (n), boxing, pugilism.
 * penkstisiz (v), to punch.