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From Proto-Brythonic *kruɨdr, from Proto-Celtic *krētros (sieve).



crwydr m (plural crwydrau)

  1. a wandering, roving, roaming
  2. a sieve, winnowing-fan

Derived terms[edit]

  • crwydrad (wandering, errant, vagrant, straying)
  • crwydredig (wandering, vagrant, roving; stray; tramped by vagabonds)
  • crwydro (to wander, roam, stroll, gad about; to spend to no purpose; to stray, go astray, err, deviate; to digress)
  • crwydrol (wandering, vagrant, roving, nomadic, migratory; erring)
  • crwydrus (wandering, vagrant, vagabond, roaming; erring, loose, profligate; poor, needy)
  • crwydrwr m (wanderer, vagrant, vagabond, rover, nomad; one who has erred or gone astray)
  • crwydryn m, crwydren f (wanderer, vagrant, vagabond, tramp, straggler)


Welsh mutation
radical soft nasal aspirate
crwydr grwydr nghrwydr chrwydr
Note: Some of these forms may be hypothetical. Not every
possible mutated form of every word actually occurs.


  • crwydr”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies, 2014