through

adjectives

having finished or arrived at completion
"certain to make history before he's done"; "it's a done deed"; "after the treatment, the patient is through except for follow-up"; "almost through with his studies"
(of a route or journey etc.) continuing without requiring stops or changes
"a through street"; "a through bus"; "through traffic"
is similar to
direct in spatial dimensions; proceeding without deviation or interruption; straight and short
"a direct route"; "a direct flight"; "a direct hit"

adverbs

from beginning to end
"read this book through"
over the whole distance
"this bus goes through to New York"
to completion
"think this through very carefully!"
in diameter
"this cylinder measures 15 inches through"
throughout the entire extent
"got soaked through in the rain"; "I'm frozen through"; "a letter shot through with the writer's personality"; "knew him through and through"; "boards rotten through and through"