The story
- Old Norse · derived frombolr“stump, trunk”
- Middle English · derived frombole“tree trunk”
- Middle English · inherited frombollard
- English todaybollard
From Middle English bollard, probably from Middle English bole (“tree trunk”), from Old Norse bolr (“stump, trunk”), equivalent to bole + -ard (pejorative or diminutive suffix).
Words from the same roots
Middle Englishbole all →
Old Norsebolr all →
Etymology from Wiktionary, CC BY-SA 4.0.