WordWeb Online

1. Make strong or stronger
   - strengthen, beef up
    
2. Enclose by or as if by a fortification
   - fort
    
3. Prepare oneself for a military confrontation
   - arm, build up, gird
    
4. Add nutrients to
   "fortified milk"
    
5. Add alcohol to (beverages)
   - spike, lace

Derived forms: fortified, fortifies, fortifying

See also: fort, fortification

Type of: add, alter, change, close in, enclose, inclose, modify, shut in

Encyclopedia: Fortify