fortifyfrom the root 'fort' (strong) + 'in' (into): to strengthen a place against attack; to invigorate or encourageThe general ordered his troops to fortify the hilltop position before nightfall.NoteThe general ordered his troops to fortify the hilltop position before nightfall.Elon.io is an online learning platformWe have an entire course teaching GRE Verbal — Essential Vocabulary grammar and vocabulary.Start learning GRE Verbal — Essential Vocabulary now