DictionaryfortifyDefensive protection
verb

fortify

FOR-tuh-fy/ˈfɔːrtɪfaɪ/

To build up strength against a threat or weakness.

Workers fortify the timber gate with iron braces and extra beams.

Workers reinforce a vulnerable timber gate with strong iron braces and extra beams, making defenses stronger.
Etymology

Literally “make strong,” fortify applies both to providing walls and defenses and to strengthening someone mentally or morally against difficulty.

In context

Oculus Imperia44:36
further reinforcements from the imperial navy and astra militarum were deployed from orbit to fortify the cathedral
The Hexarchy Crisis: High Lords vs The Primarch (Warhammer 40K Lore)

More examples

  • Her coach's encouragement fortifies her resolve before the race.
  • A hearty breakfast fortifies us for the long hike.
  • Manufacturers fortify cereal with vitamins and minerals.

Forms

fortify · fortifies · fortified · fortifying

fortification noun — The act of making something stronger.

Similar words

strengthen
Broader term for making anything stronger, not necessarily against threats.
reinforce
Emphasizes adding support to something already in place.
bolster
Often means supporting confidence, resolve, or a weak position.