noun

fortification

for-tih-fih-KAY-shun/ˌfɔːrtɪfɪˈkeɪʃn/

The strengthening of something against attack or damage.

Fortification of the town helps protect its residents from attack.

Stone defensive rampart with towers deep ditch and sturdy gate protecting small settlement, clear fortification.

Etymology

fortLatinstrong

+ificLatinto make

+ationLatinaction or process

The underlying idea is “making strong.” The word names both the strengthening of a place against attack and the defensive structures that accomplish it.

In context

Chronicle - Medieval History Documentaries37:38

Despite being a genuine defensive fortification, it was designed more as a palace for nobles.

Inside Spain's Perfectly-Preserved Medieval Fortresses

More examples

Engineers recommend fortification of the seawall before hurricane season.
The army begins fortification of the border.
The old bridge needs fortification to withstand strong currents.

Forms

fortification

fortify verb — To strengthen something against attack or damage.

Similar words

reinforcement: Emphasizes adding support or strength to something already present.
strengthening: Broader term that does not necessarily imply defense against harm.
protection: Includes preventing harm without necessarily making something stronger.