mídénum

Old Irish

From mí- (“bad, un-”) +‎ dénum (“deed”).

mídénum m (genitive mídénma)

misdeed, wrongdoing
- c. 800–825, Diarmait, Milan Glosses on the Psalms, published in Thesaurus Palaeohibernicus (reprinted 1987, Dublin Institute for Advanced Studies), edited and with translations by Whitley Stokes and John Strachan, vol. I, pp. 7–483, Ml. 71^b9
  .i. trí mídenum frium
  i.e. through doing evil to me

Masculine u-stem
	Singular	Dual	Plural
Nominative	mídénum	mídénum^L	mídénmae
Vocative	mídénum	mídénum^L	mídénmu
Accusative	mídénum^N	mídénum^L	mídénmu
Genitive	mídénmo^H, mídénma^H	mídénmo, mídénma	mídénmae^N
Dative	mídénum^L	mídénmaib	mídénmaib
Initial mutations of a following adjective: ^H = triggers aspiration ^L = triggers lenition ^N = triggers nasalization

Old Irish mutation
Radical	Lenition	Nasalization
mídenum also mmídenum after a proclitic ending in a vowel	mídenum pronounced with /β̃(ʲ)-/	unchanged
Note: Some of these forms may be hypothetical. Not every possible mutated form of every word actually occurs.