Your toes are the five movable parts at the end of each foot.

The toe of a shoe or sock is the part that covers the end of your foot.

If you dip your toes into something or dip your toes into the waters of something, you start doing that thing slowly and carefully, because you are not sure whether it will be successful or whether you will like it.

If you say that someone or something keeps you on your toes, you mean that they cause you to remain alert and ready for anything that might happen.

If you toe the line, you behave in the way that people in authority expect you to.

If you tread on someone's toes, you offend them by criticizing the way that they do something or by interfering in their affairs.