English

heatseeker

From heat + seeker.

A compound of heat + seeker

Proto-Indo-European *keHy- ‘heat’

Proto-Germanic *haitį̄

Proto-West Germanic *haitī

Old English hǣtu

Middle English hete ‘heat’

English heat

Proto-Germanic *sōkārijaz

Proto-West Germanic *sōkārī

Old English *sēċare

Middle English sekar

Today it means

noun A heat-seeking missile.

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

Etymograph / heatseeker