Lexical Definition

‎כָּפַל‎ kâphal (kaw-fal') to double ^H:V
a primitive root

double.

• to fold together
• figuratively, to repeat

1) to double, fold double, double over
1a) (Qal) to double over
1b) (Niphal) to be doubled

See Greek: διπλοῦς

Brown-Driver-Briggs

‎כָּפַל‎ verb double, double over (late) (Late Hebrew id.; Aramaic ‎כְּפַל‎; ᵑ7. ‎כִּיפְלָא‎, ‎כּוּפְלָה‎, Nabataean ‎כפל‎ Eut^{Nab. No. 20, 7} the double; Christian-Palestinian Aramaic Schw^{Idioticon 46}; North Syriac id.; Arabic the double, posteriors, buttocks; Ethiopic is divide, a part) —

Qal Perfect 2 masculine singular ‎וְכָפַלְתָּ֫‎ Exod 26:9 and thou shalt double over the sixth curtain, i.e. probably use it double (Di); Passive participle ‎כָּפוּל‎ folded double, of the breastpiece ‎(חשֶׁןׅ‎ Exod 28:16; Exod 39:9 (twice in verse). Niph`al Imperfect 3 feminine singular ‎וְתִכָּפֵל‎ Ezek 21:19* and let the sword be doubled, but very dubious; Co reads plausibly ‎תְּשַׁכֵּל‎ let the sword bereave (compare VB).

Brown-Driver-Briggs References