Strong's H2070 · Hebrew

zbuwb

zeb-oob'

from an unused root (meaning to flit); a fly (especially one of a stinging nature)

Scholarly Lexicons

Brown-Driver-Briggs (BDB)

 H2070 זְבוּב fly ( as moving to and fro in the air?)  

Brown-Driver-Briggs Hebrew Lexicon (BDB), 1906 — public domain