defnyddiol

Welsh

Alternative forms

defnyddol

Etymology

From defnydd (“use”) +‎ -iol.

Adjective

defnyddiol (feminine singular defnyddiol, plural defnyddiol, equative mor ddefnyddiol, comparative mwy defnyddiol, superlative mwyaf defnyddiol)

useful, helpful (a book etc.)
Synonyms: buddiol, llesol, ymarferol, cynorthwyol
(obsolete) material, basic, elementary
Synonyms: sylweddol, elfennol, sylfaenol

Derived terms

defnyddioldeb (“usefulness”)

Related terms

defnyddio (“to use”)

Mutation

Mutated forms of *defnyddiol*
radical	soft	nasal	aspirate
defnyddiol	ddefnyddiol	nefnyddiol	unchanged

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

References

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