Lexical Definition

‎חָמַשׁ‎ châmash (khaw-mash') to take the fifth part ^H:V
a denominative from ‎חָמֵשׁ‎

take up the fifth participle

• to tax a fifth

1) to arrange in multiples of five, take one fifth
1a) (Piel) to take one fifth, tax a fifth of

See Greek: γενεά

Brown-Driver-Briggs

II. [‎חמשׁ‎] verb denominative only Pi`el ‎וְחִמֵּשׁ אֶתֿ‎ ‎אֶרֶץ מִצְרַיִם‎ Gen 41:34 (E) and he shall fifth (take the fifth part of) the land of Egypt, i.e. the fifth part of the produce (compare Arabic take a fifth part; Ethiopic 1. 2 quinque facere).

Brown-Driver-Briggs References