"not adapted to promote interest, reputation, or other good," c. 1600; see disadvantage (n.) + -ous. Perhaps modeled on French désavantageux. Related: Disadvantageously; disadvantageousness.
a well-known study from the 1970's showed that gender stereotyping placed women in a disadvantageous position
a disadvantageous outcome
disaccord
disaccordance
disaccustom
disadvantage
disadvantaged
disadvantageous
disaffect
disaffected
disaffection
disaggregate
disagree
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