given (adj.)

late 14c., "allotted, predestined," past-participle adjective from give (v.). From 1560s as "admitted, supposed, allowed as a supposition." From late 14c. as "disposed, addicted." Middle English also had a noun give, yeve "that which is given or offered freely." The modern noun sense of "what is given, known facts" is from 1879. Given name (1827) so called because given at baptism.

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Definitions of given from WordNet
given (adj.)
(usually followed by `to') naturally disposed toward;
Synonyms: apt / disposed / minded / tending
given (adj.)
acknowledged as a supposition;
given the engine's condition, it is a wonder that it started
Synonyms: granted
given (n.)
an assumption that is taken for granted;