What's the root word for
For example in this sentence from the vlive video
유니콘 인형도 있어요. 제가 이름도 붙여줬는데요. I have a unicorn doll. I gave a name to it.
이름도 붙여줬는데요 here means "naming" / "name giving"
Another example from Strong Woman:
지난 밤 4번째 납치 사건이 발생하면서 또 한번 충격을 줬는데요 Last night a fourth kidnapping incident occurred which has caused us great shock once again.
충격을 줬는데요 means "gave a shock"
And when I search on Naver dictionary, it shows which has the root word as
주다 "to give" http://endic.naver.com/search.nhn?sLn=en&searchOption=all&query=%EC%A4%AC%EB%8A%94%EB%8D%B0%EC%9A%94
줬 comes from
주 but what does the rest of the suffixes mean in
Why did the
ㅝ and added the pachim
ㅆ? Is that a common "mutation"?