'gender-biased' originates from the combination of 'gender' and 'biased', where 'gender' refers to the social and cultural differences between sexes, and 'biased' means showing an unfair tendency or inclination.

'gender-biased' evolved from the need to describe actions or attitudes that unfairly favor one gender over another.

Initially, it meant 'showing preference based on gender', and this meaning has remained consistent in modern usage.