1. to make round; to roll up; to curl up
まるで子供のように、彼女は体を丸める。She curls up her body as if she were a child.
2. to seduce; to cajole; to explain away
3. to round off (a fraction)
4. to shave (one's head)
ここから帰ったらもう一回頭丸めるんだ。When I get back from here, I'm going to shave my head again.
5. to lump together