English
headmost
From head + -most.
Formed from head + -most
Proto-Indo-European *kap- ‘head’
…
Proto-Germanic *haubudą ‘head’
Proto-West Germanic *haubud
Old English hēafod ‘head’
Middle English heed ‘head’
English head
Today it means
adj Closest to the front of a group or pack
Language periods are conventional ranges, not dates for this word.
Etymograph / headmost