transitive verb fortified -·fied′, fortifying -·fy′·ing

1. to make strong or stronger; strengthen physically, emotionally, etc.
2. to strengthen against attack, as by building or furnishing with forts, walls, etc.
3. to support; corroborate to fortify an argument with statistics
4. to strengthen (wine, etc.) by adding alcohol
5. to add vitamins, minerals, etc. to (milk, etc.) so as to increase the food value; enrich

Etymology: ME fortifien < OFr fortifier < LL fortificare < L fortis, strong (see fort) + facere, to make, do

intransitive verb