動詞 fortify:

1. make strong or stronger
   同義詞：strengthen, beef up
2. enclose by or as if by a fortification
   同義詞：fort
3. prepare oneself for a military confrontation
   同義詞：arm, build up, gird
4. add nutrients to
5. add alcohol to (beverages)
   同義詞：spike, lace

1. The medieval town is fortified with a high wall and a deep moat.
   這座中世紀的城市用高墻深溝來加強防御。
2. After praying quietly he faced his difficulties with a fortified spirit.
   默默地祈禱后，他面對困難的勇氣倍增。
3. Good eating habits help to fortify the body against disease.
   好的飲食習慣有助于強身防病。

for.ti.fy

v.（動詞）
for.ti.fied,for.ti.fy.ing,for.ti.fies
v.tr.（及物動詞）
To make strong, as:
鞏固，強化
To strengthen and secure (a position) with fortifications.
設(shè)防御工事，設(shè)防：以防御公事加強或防護（戰(zhàn)略位置）
To reinforce by adding material.
增強：加材料鞏固…的結(jié)構(gòu)
To impart physical strength or endurance to; invigorate.
使體力增加：通過增加營養(yǎng)物恢復體力；使生氣勃勃
To give emotional, moral or mental strength to; encourage:
鼓勵：在情感、道德或精神方面增強；給…以勇氣：
例句：
Prayer fortified us during our crisis.
在關(guān)鍵時刻祈禱使我們變得堅強

To strengthen or enrich (food, for example), as by adding vitamins.
增加營養(yǎng)物：加入維生素強化食物等使之更有營養(yǎng)
v.intr.（不及物動詞）
To build fortifications.
構(gòu)筑防御工事

來源：
Middle English fortifien
中古英語 fortifien
from Old French fortifier
源自 古法語 fortifier
from Late Latin fortific3re
源自 后期拉丁語 fortific3re
from Latin fortis [strong] * see bhergh- 2
源自 拉丁語 fortis [強的] *參見 bhergh- 2

【引伸】
for.tifi.able
adj.（形容詞）
for.tifi.er
n.（名詞）
for.tify.ingly
adv.（副詞）