bisexual

The term 'bisexual' is a modern scientific compound, formed in the 19th century from the established Latin prefix 'bi-' and the English word 'sexual'. The prefix 'bi-', meaning 'two', was directly borrowed from Latin, where it originates from 'bis' (twice). 'Sexual' derives from the Latin 'sexus', a term for the distinction between male and female. When combined, the literal construction "pertaining to two sexes" was initially used in biological contexts to describe organisms possessing both male and female reproductive characteristics. This biological meaning later provided a logical, albeit imperfect, analog for human sexuality, evolving in the early 20th century to describe romantic or sexual attraction to both sexes, and later refined to mean attraction to more than one gender.

Structure: bi (two) + sexual (relating to sex) - bi: Latin origin, from 'bis' meaning 'twice' or 'two'. A prefix denoting two, double, or both. - sexual: From Latin 'sexus' (meaning 'the state of being male or female') + the English adjectival suffix '-al'. It functions as the base word denoting relation to biological sex or gender.