Etymograph

English

cofactor

From co- + factor.

A compound of co- + factor

Proto-Indo-European *ḱóm ‘beside, near, by, with’

Proto-Italic *kom ‘with, along, at’

Proto-Italic *kom- ‘together’

English co-

Proto-Indo-European *dʰeh₁k-

…

Latin faciō ‘to do, make’

Latin factor ‘doer, maker’

Anglo-Norman factour

Middle English factour

English factor

Today it means

noun A contributing factor.

Sources

Sources: Wiktionary, “cofactor”. By Wiktionary contributors, CC BY-SA 4.0, via kaikki.org (dump of Oct 3 2026); text adapted and restructured. Language periods are conventional ranges, not dates for this word. License.

Etymograph / cofactor

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