Is i learned to hold my tongue a metaphor or simile?

Here's why:

* Metaphor: A metaphor directly compares two things without using "like" or "as". In this case, "holding your tongue" is a figurative way of saying you learned to stop talking.

* Simile: A simile compares two things using "like" or "as."

Let me know if you have any other phrases you'd like to analyze!