Strong's #2179: zanab (pronounced zaw-nab')
a primitive root meaning to wag; used only as a denominative from 2180; to curtail, i.e. cut off the rear:--smite the hindmost.
Brown-Driver-Briggs Hebrew Lexicon:
zânab
1) to cut off
1a) (Piel) to attack the rear, smite the tail
Part of Speech: verb
Relation: a primitive root meaning to wag; used only as a denominative from H2180
Usage:
This word is used 2 times:
Deuteronomy 25:18: "How he met thee by the way, and smote the hindmost of thee, even all that were feeble behind thee, when thou"
Joshua 10:19: "after your enemies, and smite the hindmost of them; suffer them not to enter into"