What is the prefix for practice?

There isn't a specific prefix for "practice" in the same way there are for words like "pre-flight" or "re-read."

However, depending on the context, you might use these prefixes:

* Pre-: For something done before practicing, like "pre-practice warm-up."

* Re-: For repeating a practice, like "re-practice the piano piece."

* Pro-: To indicate professional practice, like "pro-practice basketball skills."

* In-: For something done during practice, like "in-practice drills."

Ultimately, the best prefix to use will depend on the specific meaning you want to convey.