What's the adjective for fortin? Here's the word you're looking for.
Included below are past participle and present participle forms for the
verbs fort, fortify and fortress which may be used as adjectives within certain contexts.
“Practical considerations, not beauty and comfort, determined the construction of the fortified castle.”
“Marie didn't improve much physically but she was emotionally fortified by spending time with her friend, who urged her to get back to the lab as quickly as possible.”