1) unripe grapes, sour grapes Part of Speech: noun masculine collective A Related Word by BDB/Strong’s Number: from the same as H1154 Same Word by TWOT Number: 257a
Isaiah 18:5 HEB:כְּתָם־ פֶּ֔רַח וּבֹ֥סֶר גֹּמֵ֖ל יִֽהְיֶ֣ה NAS: a ripening grape, Then He will cut off KJV: is perfect, and the sour grape is ripening INT: blossoms as the bud grape A ripening becomes
Jeremiah 31:29 HEB:אָב֖וֹת אָ֣כְלוּ בֹ֑סֶר וְשִׁנֵּ֥י בָנִ֖ים NAS: have eaten sour grapes, And the children's KJV: have eaten a sour grape, and the children's INT: the fathers have eaten sour teeth and the children's
Jeremiah 31:30 HEB:הָֽאָדָ֛ם הָאֹכֵ֥ל הַבֹּ֖סֶר תִּקְהֶ֥ינָה שִׁנָּֽיו׃ NAS: who eats the sour grapes, his teeth KJV: that eateth the sour grape, his teeth INT: man eats the sour will be set his teeth
Ezekiel 18:2 HEB:אָבוֹת֙ יֹ֣אכְלוּ בֹ֔סֶר וְשִׁנֵּ֥י הַבָּנִ֖ים NAS: eat the sour grapes, But the children's KJV: have eaten sour grapes, and the children's INT: the fathers eat the sour teeth the children's
(PS; syllable 
uncertain [Nes, privately]; Polyglotts and Castell have 
); Arabic 
unripe dates) — בֹּסֶר Isaiah 18:5 3t. בִּסְרוֺ Job 15:33; — unripe grapes Isaiah 18:5; Job 15:33; sour g. Jeremiah 31:29,30; Ezekiel 18:2. 
, 
be remote, distant, Qor 9:42, 
distant; Ethiopic 
to change, 
different, distinct, 
another).