1432: Effects of Latin Participles Nov 12, 2018
It is because of Latin participles that there is a 't' in 'commit' but an 's' in 'mission', even though they come from the same word. In Latin, it was common that if the stem of a verb ended in a 't' that the participial for would have an 's' there instead. There is no particular reason that this happened, but it affects many languages now. For instance, in English, 'compromise' is a noun and also a verb, and stressed the same way too. In German though, 'Kompromiss' is only the noun, and the verbal form is 'kompromittieren', and indeed comes from this same Latin pattern
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