Where does “bolthead” come from?

bolthead (English) comes from English Bolt, from Middle English bolt, from Old English bolt, from Old English -tūn, from Old English tūn, from Proto-West Germanic tūn, from Proto-Germanic tūną, from Gaulish dunum — smoke; mist, haze.

bolthead (English): A round-bottomed flask with a long neck; The head...

Definitions

  1. A round-bottomed flask with a long neck; The head...

Ancestry of “bolthead”, step by step

bolthead traces back through two separate lines of ancestry.

via English Bolt

StepLanguageWordMeaning
1EnglishBoltnamed after an early postmaster
2Middle Englishbolt
3Old Englishboltbolt
4Old English-tūnhomestead, village, town
5Old Englishtūnenclosure, yard; place; dwelling
6Proto-West Germanictūnfence
7Proto-Germanictūnąfence; enclosure
8Gaulishdunumfort; hill, hillfort
9Proto-Celticdūnomstronghold, rampart
10Proto-Indo-Europeandʰewh₂-smoke; mist, haze

via English head

StepLanguageWordMeaning
1EnglishheadThe part of the body of an animal or human which...
2English-yAdded to nouns and adjectives to form adjectives...
3Middle English-yDesignates an adjective, in many cases formed by...
4Old English-iġ-y, -ic
5Proto-West Germanic-gForms adjectives from nouns and verbs with a...
6Proto-Germanic-gaz-y
7Proto-Indo-European-ḱos-y, -ic
Every word from Proto-Indo-European dʰewh₂-Every word from Proto-Celtic dūnomEvery word from Gaulish dunum