with the fist

: (T, ; Vg., Goth., Copt., ), to wash the hands with the fist (, R, txt.; , R, mg.; the exact meaning is doubtful; v. Swete, in l.): .† the fist πυγμῇ νίψασθαι τ. χεῖρας πυκνά crebro diligently up to the elbow Mk 7:3

the clenched hand, i.e. (only in dative case as adverb) with the fist (hard scrubbing)

oft