gwirio

== Welsh == === Verb === gwirio (first-person singular present gwiriaf) to verify, to check ==== Conjugation ==== ==== Derived terms ==== gwiriwr (“verifier”) gwirio sillafu (“to spell check”) === Mutation === === References === R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke, et al., editors (1950–present), “gwirio”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies