stiffen
Definition
To become or make something become rigid or less flexible.
한국어 rigid 또는 less flexible가되는것이되거나 만드는
Example
"She stiffened her posture when the boss entered the room."
To become or make something become rigid or less flexible.
한국어 rigid 또는 less flexible가되는것이되거나 만드는
"She stiffened her posture when the boss entered the room."