Strong's Concordance

Original word: ὀλοθρευτής
Transliteration: olothreutés
Definition (short): destroyer
Definition (full): a destroyer

NAS Exhaustive Concordance

Word Origin: from olothreuó
Definition: a destroyer
NASB Translation: destroyer (1).
NAS Exhaustive Concordance of the Bible with Hebrew-Aramaic and Greek Dictionaries.
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Strong's Exhaustive Concordance

From olothreuo; a ruiner, i.e. (specially), a venomous serpent -- destroyer.

see GREEK olothreuo

KJV: Neither murmur ye, as some of them also murmured, and were destroyed of the destroyer.
NASB: Nor grumble, as some of them did, and were destroyed by the destroyer.