WordWeb Online

1. Make tight or tighter
   "Tighten the wire"
   - fasten
    
2. Become tight or tighter
   "The rope tightened"
    
3. Restrict
   "Tighten the rules"; "tighten up the regulations"
   - stiffen, tighten up, constrain
    
4. Narrow or limit
   "tighten the influx of foreigners"
   - reduce

Sounds like: titan, Titan

Derived forms: tightened, tightens, tightening

See also: tightening

Type of: alter, bound, change, confine, limit, modify, restrain, restrict, throttle, trammel