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Alternative forms[edit]

  • eitha (pronunciation spelling)


Old Welsh heitham, from Proto-Celtic *extamos. Cognate with Latin extimus.



eithaf (feminine singular eithaf, plural eithafion, not comparable)

  1. extreme
  2. (grammar) superlative

Derived terms[edit]



  1. quite, rather, somewhat
    O'n nhw'n eitha grymus yn y dechre ond yn y diwedd r'on ni'n rhy gryf iddyn nhw.
    They were quite powerful at the start but in the end we were too strong for them.

Usage notes[edit]

As an adverb of degree, eitha(f) is used without the linking particle yn. It comes before the adjective and does not trigger soft mutation:

Wel, mae e'n eitha golygus ond dydy e ddim yn olygus iawn.Well, he's somewhat handsome but he's not very handsome.

By contrast, the more literary adverbial expression i'r eithaf ("to the extreme") follows the adjective:

Ac mae'r modd y collodd ei fywyd yn drist i'r eithaf.And the way he lost his life was extremely sad.


eithaf m (plural eithafion or eithiafoedd)

  1. extremity, limit
    eithafoedd y ddaearthe ends of the earth

Derived terms[edit]


Welsh mutation
radical soft nasal h-prothesis
eithaf unchanged unchanged heithaf
Note: Some of these forms may be hypothetical. Not every
possible mutated form of every word actually occurs.


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