English

TACAN

Blend of tactical + air + navigation.

Ancient Greek ᾱ̓ήρ ‘mist, air’

Latin āēr

Old French air

Middle English aire

English air

Proto-Indo-European *(s)neh₂- ‘to swim’

…

Latin nāvigō ‘sail’

Latin nāvigātiō ‘sailing, navigation’

Latin nāvigātiōnem

Middle French navigation

Today it means

noun —

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