[ C ] a small stick or hook that sticks out from a surface and from which objects, especially clothes, can hang小釘；挂物釘；（尤指）挂衣鈎

[ S ] a reason for discussing something further （進一步討論某事物的）依據，理由

[ C ] a device used to fasten something into a particular place（起固定作用的）釘，栓，樁

[ C ] US informal a low fast throw in baseball全力投球，釘子球

[ C ] an arrangement that fixes a price, currency, etc. at a particular level（固定價格、貨幣等的安排）挂鈎

[ T usually + adv/prep ] to fasten something in place with pegs用釘（或樁等）固定

[ T ] to make a price, currency, etc. stay at a particular level把…固定在某一水平；限定，限制

[ T ] US informal to throw a ball in baseball low and fast（棒球）投擲快速低球