Belial, evil, naughty, ungodly (men), wicked

Boyd’s Bible Dictionary:

(lawlessness). A vile, worthless person, reckless of God and man (Deut. 13:13; Judg. 19:22; 1 Sam. 2:12). Hence, Satan (2 Cor. 6:15).

Concise Bible Dictionary:

The Hebrew word signifies “worthless, lawless,” and is not a proper name, but is used as a personification of evil; thus we have “son of Belial, daughter of Belial” (Deut. 13:13; Judg. 19:22; 1 Sam. 1:16; 1 Sam. 25:17,25). In the New Testament it is put in contradistinction to Christ as if it meant Satan ( 2 Cor. 6:15); it is there βελίαρ.

Strong’s Dictionary of Hebrew Words:

Transliteration:
bliya`al
Phonic:
bel-e-yah’-al
Meaning:
from 1097 and 3276; without profit, worthlessness; by extension, destruction, wickedness (often in connection with 376, 802, 1121, etc.)
KJV Usage:
Belial, evil, naughty, ungodly (men), wicked

Potts’ Bible Proper Names:

Wicked; vile; perverse; worthlessness:―a worthless, lawless fellow, Deut. 13:13. {Corruptus}