WordWeb Online

1. Remain under control
   "restrain your temper";
   - keep, keep back, hold back
    
2. Place limits on (extent or access)
   "restrain the use of this parking lot";
   - restrict, trammel, limit, bound, confine, throttle
    
3. Limit to within certain bounds; physically prevent from moving
   - confine, hold
    
4. Limit or hold back; keep within a small range
   - encumber, cumber [archaic], constrain
    
5. To compel or deter by or as if by threats
   - intimidate

Derived forms: restrained, restrains, restraining

Type of: bottle up, check, contain, control, curb, disable, discourage, disenable, frustrate, hold, hold in, incapacitate, inhibit, moderate, suppress