noun pl. affinities
- relationship by marriage
- close relationship; connection
- similarity of structure, as of species or languages, implying common origin; family resemblance
- a natural liking or sympathy; esp., a mutual attraction between a man and a woman
- a person of the opposite sex who especially attracts one
- the attractive force, of varying strength for various elements, molecules, etc., that causes the atoms of certain elements to combine and stay combined
Origin:
ME affinite < OFr afinite < L affinitas < affinis, adjacent, related by marriage < ad-, to + finis, a border