Feminine of 'eber -- feather, wing.
see HEBREW 'eber
H84. ebrah
אֶבְרָה noun feminine pinion (noun of individual meaning, in poetry) of ostrich Job 39:13; אֶבְרָתוֺ of eagle, simile for ׳י Deuteronomy 32:11; metaphor of ׳י Psalm 91:4; אֶבְרוֺתֶיהָ of dove 68:14; (all "" כּנף).