What does can mean in Latin?

Depending on how the question is intended, one or more of the following answers may be relevant:

1. the Word can does not exist in Latin. But canis does exist, whose meaning is "dog" and can in Spanish with the same meaning in Latin.

2. the Latin equivalent for the English auxiliary verb "can" is some form of the verb posse, "to be able". For example, "I can fly" is possum volare ("I-am-able to-fly").

3. the Latin root "can-" means "sing" and shows up in such Words as canere or cantare "to sing", cantio "singing", cantus "song; chan