fortify
definition
to strengthen or secure a place against attack
example
The military decided to fortify the borders with additional troops and barriers to prevent any invasions.
synonyms
strengthensecurereinforce
word origin — The word 'fortify' originates from the Old French 'fortifier', derived from the Latin 'fortificare', which is composed of 'fortis' meaning 'strong' and 'facere' meaning 'to make'.