fortify
US /ˈfɔːr.t̬ə.faɪ/
UK /ˈfɔːr.t̬ə.faɪ/
1.
to strengthen (a place) with defensive works so as to protect it against attack
:
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The soldiers worked quickly to fortify their position before the enemy arrived.
•
The ancient city walls were built to fortify against invasions.
2.
to add strength or effectiveness to
:
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The vitamins are added to fortify the cereal.
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He drank a strong coffee to fortify himself for the long night ahead.