The story
- Proto-Indo-European*gerh₂-der.?
- Proto-Germanic*krēanądeverb.
- Proto-Germanic*krēǭ
- Proto-West Germanic*krāā
- Old Englishcrāwe
- Middle Englishcrowe
- Englishcrow
- Vulgar Latin*barra
- Old Frenchbarre
- Middle Englishbarre
- Englishbar
- English todaycrowbar
From crow (“crow (bird)" also "metal lever, crowbar”) + bar, probably because the forked end looks like a crow's foot.
Etymology from Wiktionary, CC BY-SA 4.0.