taper

n. 小蜡烛,尖细,渐弱
a. 尖细的
v. 逐渐变小

Financial aids generally taper off after the first year of college.

助学金通常在大学一年级之后逐渐减少。

Taper the plug off a bit with the chisel so that it will fit into the hole.

用凿子把塞子的一头削掉一点，使它能塞进洞里。