English

sublibrary

From sub- + library.

Proto-Indo-European *upó ‘up; from below’

Proto-Italic *supo ‘under’

Latin sub ‘under, beneath, below’

English sub-

Latin liber ‘inner bark; book’

…

Latin librārium ‘bookcase’

Old French librairie

Anglo-Norman librarie

Middle English librarie ‘library’

Today it means

noun A library forming part of a larger library.

Language periods are conventional ranges, not dates for this word.

Etymograph / sublibrary