gwynt i'r bôn braich

== Welsh == === Etymology === Literally, “wind to the biceps”. === Proverb === gwynt i'r bôn braich (idiomatic) work away! a wind in your sails! === Further reading === R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke, et al., editors (1950–present), “gwynt”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies