The book got warped from the humidity.
godan verb (-ru), intransitive verb
turn; make a turn
Used for changing direction while moving, such as turning a corner or veering. Often appears with direction words like 右, 左, or 角.
See also: 折れる (おれる)
次の交差点を左に曲がってください。
Please turn left at the next intersection.
角を曲がるとすぐに郵便局があります。
Turn the corner and you'll see the post office right away.
godan verb (-ru), intransitive verb
be crooked; be askew; be awry
Describes a state of being not straight, aligned, or level. Often used for posture, objects, or moral character.
ネクタイが曲がっているよ。
Your tie is crooked.
彼は根性が曲がっている。
He has a crooked disposition.