through

(noun): A large slab of stone laid in a dry-stone wall from one side to the other; a perpend.
(adjective): Passing from one side of something to the other.
(adjective): Finished; complete.
(adjective): Without a future; done for.
(adjective): No longer interested; wearied or turned off by experience.
(adjective): Proceeding from origin to destination without delay due to change of equipment.
(adjective): In possession of the ball beyond the last line of defence but not necessarily the goalkeeper; through on goal.
(adverb): From one side to the other by way of the interior.
(adverb): From one end to the other.
(adverb): To the end.
(adverb): Completely.
(adverb): Out into the open.
(preposition): From one side of an opening to the other.
(preposition): Entering, then later leaving.
(preposition): Surrounded by (while moving).
(preposition): By means of.
(preposition): In consequence of; as a result of.
(preposition): To (or up to) and including, with all intermediate values.

Interstate highways form a nationwide system of through roads.
They were through with laying the subroof by noon.
After being implicated in the scandal, he was through as an executive in financial services.
She was through with him.
The through flight through Memphis was the fastest.