From Middle Welsh arbenn (“chief”), from Proto-Celtic *ɸarekʷennom (“extremity, end”), from *kʷennom (“head”).

Equivalent to ar- (“on”) +‎ pen (“head”) +‎ -ig.

• IPA^(key): /arˈbɛnɪɡ/

arbennig (feminine singular arbennig, plural arbenigion, equative mor arbennig, comparative mwy arbennig, superlative mwyaf arbennig)

1. special

• anghenion arbennig (“special needs”)
• arbenigo (“to specialise”, verbnoun)
• arbenigol (“specialist”, adjective)
• arbenigwr m (“specialist”)
• arbenigwraig f (“specialist”)

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