vt.

1. 控告，對……提起訴訟[（+for）]
   She sued the company for racial discrimination.

   她以種族歧視為由對公司起訴。

2. 請求；要求[（+for）][O2]
   The boy sued his father for mercy.

   男孩向他父親求饒。

3. 向……求愛，向……求婚

vi.

1. 控告，提出訴訟[（+for）]
   They sued for breach of contract.

   他們以違反合同為由提出訴訟。

2. 請求；要求[（+for/to）]
3. 求愛，求婚[（+for）]

v.

1. institute legal proceedings against (a person or institution), typically for redress.
2. formal appeal formally to a person for something.