through

preposition:from one side or end of something to the other
- We walked through the forest.
preposition:during the whole period of
- She worked through the night.
preposition:by means of; using
- He submitted the application through the online portal.
adverb:from beginning to end; completely
- Read the instructions through before starting.
adjective:direct; without stops or changes
- We booked a through flight to Tokyo.
adjective:finished or completed; over
- Once the meeting is through, we can leave.
- Are you through with your homework?