vt.

1. 违反，违背（规则、法律等）
   His behavior transgressed the unwritten rules of social conduct.

   他的行为违反了不成文的社交规范。

2. 侵犯，越过（限度、范围等）

vi.

1. 违法，犯罪
2. 越界

v.

1. go beyond the limits set by (a moral principle, standard, law, etc.).
2. Geology  (of the sea) spread over (an area of land).