vt.使緊；勒緊；固定
vi.變緊
He tightened his grip on her arm. 他緊抓她的手臂。
The plumber take out a wrench and tighten the bolt. 修水管的工人拿出一把扳手擰緊了螺栓。
While holding down on the cone, tighten the subbase screws. 用手壓住漏斗，擰緊座墊固定螺絲。
If table index shafts are loose, tighten mounting bolts. 如果臺面索引軸松動，擰緊固定螺栓。
用作不及物動詞 (vi.)This screw needs tightening. 這螺絲釘需要再擰緊些。
Controls in the city have gradually tightened. 對這個城市的控制逐漸加強。
強制性節(jié)約
