• (North Wales) IPA^(key): /ˈsei̯vɨ̞s/
• (South Wales) IPA^(key): /ˈsei̯vɪs/

Borrowed from Middle English cyves.

• seifs, sifys, sifi, syfi, steifys, stifys

seifys (plural, singular seifysen f, not mutable)

1. chives (species)

seifys (not mutable)

1. (obsolete) alternative form of syfi (“strawberries”)

• Cymdeithas Edward Llwyd (2018), “Y Bywiadur”, in Llên natur‎^[1], retrieved 24 December 2025.
• R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke, et al., editors (1950–present), “seifys”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies