tight /tait/ I.adj. 1.紧身的，不松动的，牢固的：My shoes are too tight. 我的鞋子太紧了。The drawer is so tight that I can’t open it. 抽屉太紧，我打不开。 2. (日程)紧张：have a tight schedule today 今天日程安排太紧 ‖II. adv. 紧地；满满的：Shut the door tight. 把门关紧。The bags were packed tight. 包被塞得满满的。
tightly /ˈtaitli/ adv.紧，满满地：The passengers were tightly packed in the train.火车里挤满乘客。He caught her hand and held it tightly. 他抓住她的手，紧紧地握住。
tighten /ˈtaitən/ vt. & vi. 1. 变紧，绷紧，拉紧 2.用于短语动词 tighten up上紧；加强控制：Now tighten up the screws.现在上紧螺丝。Are there any plans to tighten up on advertising controls?有计划加强对广告的控制吗？
