Origin of 信じる, 感じる, etc?


Wikipedia claims that Japanese verbs are a closed class and that loanwords
from Chinese always use する. 信じる, 感じる seems to be an exception. Why aren't they
信をする and 感をする? Maybe because one kanji is too short?

Also, what is the origin of the ending じる used with these two borrowed verbs?




-ziru is from -zuru, which in turn is verb -suru voiced due to compounding. zuru becomes ziru during the push to normalize verbs to 一段 class.




-ziru is from -zuru, which in turn is verb -suru voiced due to compounding. zuru becomes ziru during the push to normalize verbs to 一段 class.

