Similar words: frightened, enlightened, tighten, lighten, frighten, heighten, brighten, enlighten. Meaning: ['taɪtn] 
adj. made tighter or more stringent.
adj. made tighter or more stringent. 
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151. Stainless steel bolts and nuts shall be tightened on manhole covers.
152. Her jaw line tightened to squareness and her eyes went emerald.
153. To counteract these problems, Beijing ordered central planning and control tightened again.
154. If sound seeds result , precautions against contamination must be tightened.
155. In the meantime, the NPC has tightened inspection of and supervision over law enforcement.
More similar words: frightened, enlightened, tighten, lighten, frighten, heighten, brighten, enlighten, lightening, straighten, frighten away, frightening, brightening, straighten up, frighteningly, enlightenment, tight, tightly, fighter, airtight, hold tight, high tech, eighteen, blighted, high-tech, delighted, righteous, benighted, foresighted, righteously.