expression, godan verb (-su)
stretch one's neck; crane one's neck
Describes the physical action of extending the neck forward or upward, often to see something better.
彼は前の人の頭越しに見ようと首を伸ばした。
He craned his neck to see over the heads of the people in front.
猫が窓の外を見
The cat is stretching its neck to look outside the window.