Noun
Verb (する, transitive)
1. study
ここで勉強した時間もあったはずである。There must have been time spent studying here.
Noun
Verb (する, intransitive)
2. diligence; working hard
3. experience; knowledge; lesson (for the future)
今回のことはいい勉強だと思え。Think of what happened this time as a good lesson.
Noun
Verb (する, transitive)
4. discount; price reduction
この値段、もう少し勉強してもらえませんか？Could you knock a little more off this price?