'th

'th (triggers mixed mutation)

1. your (informal second person singular possessive determiner)
2. thy; thine

'th (triggers mixed mutation)

1. you (informal second person singular pronoun)
2. thee

• IPA^(key): /θ/

'th

1. (literary) your (familiar singular; triggers soft mutation of a following consonant)
   • 18th century, “Myfanwy”:

     Myfanwy, boed yr holl o’th fywyd
     Dan heulwen ddisglair canol dydd.

     Myfanwy, may your life entirely be
     Beneath the midday sun's bright glow.

   Synonym: dy

'th

1. (literary) you (familiar singular; used after vowels as the direct object of a verb; triggers soft mutation of a following consonant)
   • 1588, Y Beibl cyssegr-lan, Genesis 28:15:

     Ac wele fi gyda thi; ac mi a’th gadwaf pa le bynnag yr elych, ac a’th ddygaf drachefn i’r wlad hon: oherwydd ni’th adawaf, hyd oni wnelwyf yr hyn a leferais wrthyt.

     Behold, I am with you and will keep you wherever you go, and will bring you back to this land; for I will not leave you until I have done what I have spoken to you.

   Synonyms: di, ti

• The determiner can be considered a "contraction" of dy used after mostly functional vowel-final words.
• The pronoun occurs after certain vowel-final preverbal particles, such as fe, a, ni, na, oni and pe.

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