The story
- Proto-Indo-European*dwóh₁
- Proto-Indo-European*trísinflu.
- Proto-Indo-European*d(w)is-
- Proto-Italic*dis-
- Latindī-
- Proto-Indo-European*mey-?
- Proto-Indo-European*meyth₂-
- Proto-Indo-European*méyth₂eti
- Proto-Italic*meitō
- Old Latinmītō
- Latinmittō
- Latindīmittō, ~mittĕre, ~mīsī, ~missum
- Middle Englishdismissen /dismisen
- Englishdismiss
- Proto-Indo-European*h₂el-
- Proto-Indo-European*h₂élisder.?
- English todaydismissal
From dismiss + -al. A nineteenth-century coinage (modelled on committal etc.), replacing the regular form dismission.
Etymology from Wiktionary, CC BY-SA 4.0.