unionsyth

== Welsh == === Etymology === uniawn (“straight, upright”) +‎ syth (“straight”). === Adjective === unionsyth (feminine singular unionsyth, plural unionsyth, not comparable) perfectly straight upright, erect, vertical Synonyms: fertigol, perpendicwlar (figurative) righteous Synonyms: cyfiawn, cywir immediate, direct(ly) straight Synonyms: uniongyrchol, di-oed === Further reading === R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke, et al., editors (1950–present), “unionsyth”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies