acquired — obtained, through buying or being given
extrinsic — Not part of the essential nature of someone or something; coming or operating from outside.
incidental — happening or likely to happen in an unplanned or subordinate conjunction with something else.
inessential — not essential; not necessary; nonessential.
insignificant — unimportant, trifling, or petty: Omit the insignificant details.
learned — having much knowledge; scholarly; erudite: learned professors.
nonessential — not essential; not necessary: Nonessential use of gasoline was forbidden during the war.
secondary — next after the first in order, place, time, etc.
unimportant — of much or great significance or consequence: an important event in world history.
flawed — characterized by flaws; having imperfections: a flawed gem; a seriously flawed piece of work.
imperfect — not perfect; lacking completeness: imperfect knowledge.
minor — lesser, as in size, extent, or importance, or being or noting the lesser of two: a minor share.
wrong — not in accordance with what is morally right or good: a wrong deed.
accessory — Accessories are items of equipment that are not usually essential, but which can be used with or added to something else in order to make it more efficient, useful, or decorative.
atypical — Someone or something that is atypical is not typical of its kind.
auxiliary — An auxiliary is a person who is employed to assist other people in their work. Auxiliaries are often medical workers or members of the armed forces.
subsidiary — serving to assist or supplement; auxiliary; supplementary.
