勒勒[lēi]动1.■（系紧; 拉紧） tie or strap sth. tight; tighten:背包带太紧，勒得慌。The pack straps are too tight. They cut into the flesh.带子太松了， 再勒一勒。The strap is too loose. Tighten it up a bit.另见 lè。