Translation of "Lump" in Chinese

He is a lump of selfishness.

他是个极其自私自利的人。

That boy threw a lump of rock.

那个男孩抛了一块石头。

I bumped my head against the door and got a lump.

我头撞到了门，肿了一块。

- That boy threw a chunk of stone.
- That boy threw a lump of rock.

那个男孩抛了一块石头。