athro

From Middle Welsh athro (“teacher”), from Proto-Brythonic *alltrọw, from Proto-Celtic *altrawū (“foster-uncle”), from *aleti (“to nourish”). Related to Breton aotrou m (“lord, gentleman”). Doublet of alltraw (“godfather”).

• IPA^(key): /ˈaθrɔ/

athro m (plural athrawon or athrawion, feminine athrawes)

1. teacher
2. professor

When used to mean "teacher", this term refers only to males, the coordinate female term being athrawes. The plural athrawon serves when talking of a group of both genders. When used to mean "professor", athro it is written with the definite article and upper case A ("Yr Athro"), has no specific gender reference and used for a female or a male.

• prifathro m (“headmaster, headteacher”)
• athro llanw (“supply teacher”)

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