English
headblock
From head + block.
Proto-Indo-European *kap- ‘head’
…
Proto-Germanic *haubudą ‘head’
Proto-West Germanic *haubud
Old English hēafod ‘head’
Middle English heed ‘head’
English head
Proto-Indo-European *bʰelǵ- ‘thick plank’
…
Old Dutch *blok ‘log’
Middle Dutch blok ‘treetrunk’
Old French bloc ‘log’
Middle English blok ‘log’
English block
Today it means
noun In a sawmill carriage, a cross-block on which the head of the log rests.
Language periods are conventional ranges, not dates for this word.
Etymograph / headblock