clench one´s fist
He doubled up his fists in anger.
他愤怒地握紧拳头。
—— 辞典例句She struck her forehead with her clenched fist.
她握紧拳头打着前额。
—— 辞典例句She stiffened herself with clenched fists.
她握紧拳头,铁青脸。
—— 辞典例句The youth grew crimson, and clenched his fists, with every appearance of a meditated assault.
这年轻人脸上通红, 握紧拳头, 简直想要摆出动武的架势。
—— 辞典例句Alex clenched her fists and gritted her teeth.
亚丽克斯握紧拳头,咬紧牙。
—— 《柯林斯英汉双解大词典》