This is the 13947th most frequent Korean word.
망치로
"망치로" means "with a hammer."
The word '망치로' here is used as 'with a hammer' to indicate the instrument by which the action is performed.
망치로 못을 박다.
Hammer nails with a hammer.
The word '망치로' describes the method or tool used, which in this case is a hammer to knock on the door.
망치로 문을 두드렸다.
Knocked on the door with a hammer.
The term '망치로' signifies the means of breaking the wall—in this case, utilizing a hammer.