The adjective abbreviated and the verb abbreviate both come from the noun abbreviation, with its Latin root, abbreviare, "make brief," from ad-, "to," and breviare, "shorten." Definitions of abbreviated.
Something that's abbreviated is shortened or condensed. ... The adjective abbreviated and the verb abbreviate both come from the noun abbreviation, with its Latin root, abbreviare, "make brief," from ad-, "to," and breviare, "shorten."