As a Noun:
1. A traditional sentence that people often say and that gives advice or information about human life and experience. English = saying.
2. The way someone goes about using words or signs to communicate a specific piece of information or a story. English = telling, rendition.
3. The words or signs of another person which you accept as the reason or authority for you to do something. Informal English = say-so.
4. Something that you say that gives your opinion of something or which gives an explanation of it. English = comment.
As a Verb or Adjective:
1. To speak words. English = say.
2. To use spoken words, written words or signs to communicate something to someone else. English = say, tell.
3. To use spoken words, written words or signs to briefly talk about something to someone else (usually when the main reason for the communication is another piece of information). English = mention.
4. To say something that gives your opinion of something or which gives an explanation of it. English = comment.