crwydro

Welsh

From crwydr (“wandering, roving, roaming”) +‎ -o.

crwydro (first-person singular present crwydraf)

to wander, roam, stroll, gad about
to spend to no purpose
to stray, go astray, err, deviate
Mae hynny'n crwydro ychydig yn bellach oddi wrth y ddadl nag a ddymunaswn.
That is straying a little further from the debate than I would have liked.
to digress

Mutated forms of *crwydro*
radical	soft	nasal	aspirate
crwydro	grwydro	nghrwydro	chrwydro

Note: Certain mutated forms of some words can never occur in standard Welsh.
All possible mutated forms are displayed for convenience.

R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke et al., editors (1950–present), “crwydro”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies