Where does “crowsnest” come from?

crowsnest (English) comes from English nest, from Middle English nest, from Old English nēst, from Old English nīehst, from Proto-West Germanic **nāhwist(ō), from Proto-Germanic nēhwist, from Proto-Germanic nēhw, from Proto-Germanic nēhwaz — to reach, to attain.

Ancestry of “crowsnest”, step by step

crowsnest traces back through two separate lines of ancestry.

via English nest

StepLanguageWordMeaning
1EnglishnestA structure built by a bird as a place to...
2Middle Englishnestnest
3Old Englishnēstnest
4Old Englishnīehstnearest, next
5Proto-West Germanic**nāhwist(ō)nearest, closest
6Proto-Germanicnēhwistnearest, closest
7Proto-Germanicnēhwnear, close
8Proto-Germanicnēhwaznear, close
9Proto-Indo-Europeanh₂nḗḱwos
10Proto-Indo-Europeanh₂neḱ-to reach, to attain

via English Crow

StepLanguageWordMeaning
1EnglishCrowA member of a Native American tribe of southern...
2Middle Englishcrowecrow; A metal bar or lever; a crowbar;...
3Middle EnglishcrowenTo crow; To make other noises typical of birds;...
4Old Englishcrāwecrow
5Proto-West Germanickrāācrow
6Proto-Germanickrēǭcrow
7Proto-Indo-Europeanger-to turn, bend, twist, wind; to tie, bind...
Every word from Proto-Indo-European h₂neḱ-