钩儿
钩 (鉤) gōu
hook noun
a curved tool or device used for catching, holding, or pulling; a window catch

他伸手把窗户上的钩挂好，防止被风吹开。

tā shēn​shǒu bǎ chuāng​hu shàng de gōu guà​hǎo, fáng​zhǐ bèi fēng chuī​kāi.

He reached out and fastened the hook on the window to prevent it from being blown open by the wind.

check mark noun
a tick or mark (✓) used to indicate that something is correct or checked off

请在已完成的项目旁边打个钩。

qǐng zài yǐ wán​chéng de xiàng​mù páng​biān dǎ gè gōu.

Please put a checkmark next to the completed items.

to crochet verb
to make or decorate something by looping yarn with a hooked needle; to sew

她会钩各种花样的蕾丝。

tā huì gōu gè zhǒng huā​yàng de lěi​sī.

She can crochet lace in various patterns.

to hook noun
to catch, connect, or fasten with a hook

他的毛衣被钉子钩破了。

tā de máo​yī bèi dīng​zi gōu pò le.

His sweater was snagged and torn by a nail.