dat-

See also: Appendix:Variations of "dat"

Old Irish

Pronunciation
  • IPA(key): /dad/

Prefix

dat- (class B & C infixed pronoun, triggers lenition)

  1. Alternative form of dot- (“thee, you (singular object pronoun)”)

See also
Old Irish affixed pronouns

See Appendix:Old Irish affixed pronouns for details on how these forms are used.
Note that the so-called “infixed” pronouns are technically prefixes, but they are never the first prefix in a verbal complex.

Person Infixed Suffixed
Class A Class B Class C
1 sing. m-L dom-L, dam-L -um
2 sing. t-L dot-L, dat-L, dut-L, dit-L -ut
3 sing. m. a-N, e-N d-N id-N, did-N, d-N -i, -it
3 sing. f. s-(N) da- -us
3 sing. n. a-L, e-L d-L id-L, did-L, d-L -i, -it
1 pl. n- don-, dun-, dan- -unn
2 pl. b- dob-, dub-, dab- -uib
3 pl. s-(N) da- -us
L means this form triggers lenition.
N means this form triggers nasalization (eclipsis)
(N) means this form triggers nasalization in some texts but not in others.

Welsh

Alternative forms

Etymology

See dad-.

Pronunciation
  • IPA(key): /dat/

Prefix

dat-

  1. undo, un-, dis-
    Synonym: dad-
    ‎dat- + ‎plygu (“to fold”) → ‎datblygu (“to unfold, to develop”)
    ‎dat- + ‎cuddio (“to hide”) → ‎datguddio (“to reveal”)
    ‎dat- + ‎drysu (“to entangle, to confuse”) → ‎datrys (“to disentangle, to solve”)
  2. re-
    Synonym: dad-
    ‎dat- + ‎canu (“to sign”) → ‎datgan (“to announce, to declare”)

Derived terms
Welsh terms prefixed with dat-

Mutation
Welsh mutation
radical soft nasal aspirate
dat- ddat- nat- unchanged
Note: Some of these forms may be hypothetical. Not every possible mutated form of every word actually occurs.

References

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

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