Sorry the title is really not specific and bad but basically I was wondering how to know if the verb of a kanji/or phrase would be a suru verb? Like 勉強 would be 勉強する I from what I’ve observed, since it’s two kanjis stuck together it would be suru but I’m not sure if there’s like a rule. Like 見る isn’t a suru verb and I’m not too sure what you call these kinds of verb (and that’s why I think my title is trash) but some single kanji can also be a suru verb like 愛する.
I was wondering if there’s a rule or if I just simply have to remember if it’s a suru verb or not.
Thanks in advance!