Strong's Concordance

Original word: אֶרְאֵל
Transliteration: erel
Definition (short): brave
Definition (full): perhaps a hero

NAS Exhaustive Concordance

Word Origin: of uncertain derivation
Definition: perhaps a hero
NASB Translation: brave men (1).
NAS Exhaustive Concordance of the Bible with Hebrew-Aramaic and Greek Dictionaries.
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Strong's Exhaustive Concordance

Probably for 'ariy'el; a hero (collectively) -- valiant one.

see HEBREW 'ariy'el

KJV: Behold, their valiant ones shall cry without: the ambassadors of peace shall weep bitterly.
NASB: Behold, their brave men cry in the streets, The ambassadors of peace weep bitterly.