affinity
//əˈfɪnɪti//
Noun
affinitySingular
affinitiesPlural
1
A natural liking, attraction, or feeling of kinship toward someone or something.
She felt an immediate affinity for the small coastal town.
2
A similarity or resemblance in characteristics or structure between things.
There is a clear affinity between the two languages in terms of grammar.
3
A relationship by marriage rather than by blood.
She is related to me by affinity, not by blood.
4
In chemistry, the tendency of a substance to combine with another substance.
Oxygen has a strong affinity for hydrogen, which is why water forms so easily.