rack

n. 架,行李架,拷问台
v. 折磨,使...痛苦,加以拷问

He put his shoes on the rack.

他把鞋放在架子上。

Even after racking his brains he couldn't think of a single example.

即使绞尽脑汁，他还是连一个例子也想不出来。