gweithio allan

== Welsh == === Etymology === Calque of English work out. === Verb === gweithio allan (first-person singular present gweithiaf allan) (transitive, idiomatic) to work out, to figure out, to resolve Synonyms: dadelfennu, penderfynu === Further reading === R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke, et al., editors (1950–present), “gweithio allan”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies