byth

== Welsh == === Etymology === From Middle Welsh byth, possibly borrowed from Old Irish bith, in which case doublet of byd. === Pronunciation === (North Wales) IPA(key): /bɨːθ/, /bɨ̞θ/ (South Wales) IPA(key): /bɪθ/ Rhymes: -ɨːθ, -ɨ̞θ === Noun === byth m (plural bythoedd) eternity ==== Derived terms ==== am byth byth bythoedd bythol === Adverb === byth even (following the comparative degree of adjectives) ever (in interrogative clauses) never, ever (in negative clauses) ==== Usage notes ==== In the standard language, when qualifying verbs, erioed is used with completed tenses in the past (present perfect, simple past, pluperfect), while byth is used with other tenses (present, future, imperfect, conditional). In some southern dialects, byth may be used colloquially where standard language employs erioed. With verbs negated by ddim, byth is usually found in post-subject position, where it replaces the ddim. Byth usually resists mutation but may be mutated in some cases, for example, optionally when following the comparative degree of adjectives. ==== Related terms ==== === Mutation === === References ===