Strong's #1620: gargar (pronounced gar-gar')
by reduplication from 1641; a berry (as if a pellet of rumination):--berry.
Brown-Driver-Briggs Hebrew Lexicon:
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gargar
1) berry, olive berry
Part of Speech: noun masculine
Relation: by reduplication from H1641
Usage:
This word is used 1 times:
Isaiah 17:6: "of an olive tree, two or three berries in the top of the uppermost bough, four or five"