Lexical Definition

‎אִטֵּר‎ ʼiṭṭêr (it-tare') lefthanded ^H:A
from ‎אָטַר‎

[phrase] left-handed.

• shut up, i.e. impeded (as to the use of the right hand)

1) bound, impeded (on the right, ie, left-handed), shut, shut up

Brown-Driver-Briggs

‎אִטֵּר‎ adjective shut up, bound (Late Hebrew ‎אִטֵּר‎, lame) ‎יַדיְֿמִינוֺ‎ ‎׳‎‎אִישׁ א‎ Judg 3:15; Judg 20:16 a man bound, restricted, as to his right hand, i.e. left-handed.

Brown-Driver-Briggs References