gwrthystyr

== Welsh == === Etymology === gwrth- +‎ ystyr (“meaning”). === Noun === gwrthystyr m (plural gwrthystyron) antonym Antonyms: cyfystyr, cyfystyreb === Mutation === === Further reading === Delyth Prys; J.P.M. Jones; Owain Davies; Gruffudd Prys (2006), Y Termiadur: termau wedi'u safoni; standardised terminology‎[1] (in Welsh), Cardiff: Awdurdod cymwysterau, cwricwlwm ac asesu Cymru (Qualifications curriculum & assessment authority for Wales), →ISBN