Extended Strong's Greek Lexicon (Abbott-Smith based)
fist
Usage: πυγμή, -ῆς, ἡ [in LXX: Exo.21:18, Isa.58:4 (אֶגְרֹף) * ;] the fist: πυγμῇ νίψασθαι τ. χῖρας (Τ, πυκνά; Vg., Goth., Copt., crebro), to wash the hands with the fist (diligently, R, txt.; up to the elbow, R, mg.; the exact meaning is doubtful; see Swete, in l): Mrk.7:3.† (AS)