"Be through with" is a phrasal verb that means to finish or complete something. Here are some synonyms for this phrase:
1. Finish: to bring something to a conclusion or come to an end.
2. Complete: to finish something in its entirety or reach the end of a task.
3. Conclude: to bring something to a final decision or closure.
4. End: to come to a conclusion or termination.
5. Wrap up: to finish something quickly or bring it to a quick end.
6. Accomplish: to successfully complete a task or goal.
7. Achieve: to successfully reach a desired outcome or objective.
8. Finalize: to complete something in its final form or make a decision.
9. Terminate: to put an end to something or bring it to a close.
Using any of these synonyms could help add variety to your writing and convey your message more effectively.