adscititious

adjectives

added or derived from something outside; not inherent
"an adscititious habit rather than an inherent taste"
is similar to
not forming an essential part of a thing or arising or originating from the outside
"extrinsic evidence"; "an extrinsic feature of the new building"; "that style is something extrinsic to the subject"; "looking for extrinsic aid"
supplemental; not part of the real or essential nature of a thing
"adscititious vowels"
is similar to
not basic or fundamental