English

incenter

From in- + center.

A compound of in- + center

Proto-Indo-European *h₁én ‘in’

Proto-Germanic *in ‘into’

English in-

Proto-Indo-European *ḱéntrom ‘pointed tool’

…

Ancient Greek κέντρον ‘something with a sharp point: point’

Latin centrum

Middle French centre

Middle English center

Today it means

noun The point formed at the intersection of the three angle bisectors of a triangle; also the centre of the incircle.

Language periods are conventional ranges, not dates for this word.

Etymograph / incenter