Meaning of “fortify” - Learner’s Dictionary

fortify

verb [ T ] uk us /ˈfɔːtɪfaɪ/
PLACE

to build strong walls, towers, etc around a place to protect it:

a fortified city/town
PERSON

to make someone feel stronger physically or mentally:

She had a sandwich to fortify herself before going on.

(Definition of “fortify” from the Cambridge Learner’s Dictionary © Cambridge University Press)