thorough
(complete; including every possible detail)
- We did a thorough search of the place but found nothing.
- It’s my job to conduct a thorough investigation.
(careful to do things in an accurate and exact way)
- He is very thorough.
through
(from one end or side to the other)
- We must go through the woods.
- Our train passed through a tunnel.
(by means of)
- I sold my car through advertising in the social media.
- You will achieve your ambition through hard work.