/
ˈfɔːtɪfʌɪ/
v.
 (fortifies, fortifying, fortified)
   - provide with defensive works as protection against attack.
 - invigorate or encourage.
 - 
[often as adj. fortified]
 add spirits to (wine) to make port, sherry, etc. 
▸increase the nutritive value of (food) by adding vitamins.
 
Derivative
- fortifiable adj.
  - fortifier n.
 
Etymology
ME: from Fr. fortifier, from late L. fortificare, from L. fortis ‘strong’.