English

airmark

From air + mark, modelled on landmark.

A compound of air + mark

Ancient Greek ᾱ̓ήρ ‘mist, air’

Latin āēr

Old French air

Middle English aire

English air

Proto-Indo-European *mórǵs ‘edge’

Proto-Germanic *markō ‘boundary’

Proto-West Germanic *marku ‘boundary’

Old English mearc ‘mark’

Middle English mark

English mark

Today it means

noun A recognizable natural or man-made feature used for aerial navigation.

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