twcio i mewn

== Welsh == === Etymology === Calque of English tuck in. === Verb === twcio i mewn (first-person singular present twciaf i mewn) to tuck in === Mutation === === Further reading === R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke, et al., editors (1950–present), “twcio i mewn”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies: “twcio”