radarman

Etymology tree
English radiotelegraphyclip.
English radio
Latin dētēctiōder.
Latin dētēctiōnembor.
English detection
Proto-Indo-European *h₂ent-
Proto-Indo-European *-s
Proto-Indo-European *h₂énts
Proto-Indo-European *-i
Proto-Indo-European *h₂énti
Proto-Germanic *andi
Old English and
Middle English and
English and
Proto-Indo-European *(H)rek-der.
Proto-Celtic *reketi
Gaulish *rekosbor.?
Proto-Indo-European *h₃reǵ-der.
Proto-Germanic *rinkanąder.
Proto-Germanic *rankaz
Frankish *rankbor.?
Vulgar Latin *rencus
Old French reng
Proto-Italic *-āzi
▲
Latin -ereinflu.
Latin -āre
Old French -ier
Old French rengierbor.
Middle English rengen
English range
Middle English -ynge
English -ing
English ranging
English RADAR
English radar
English -man
English radarman
From radar + -man.