fortify
/ˈfɔ:tɪfaɪ; `fɔrtəˌfaɪ/ v
(pt, pp -fied)
1 [Tn, Tn.pr]
~ sth (against sth)
(a) strengthen (a place) against attack, by building walls, etc 防卫（某地）（筑围墙等）
fortify a town against invasion 加强防卫一城镇以抵御敌人入侵
a fortified city 设防的城市.
(b) support or strengthen (sb) physically or morally （在物质或道义上）支持（某人）
Fortified against the cold by a heavy coat, he went out into the snow. 他穿上御寒的大衣冒雪外出.
fortify oneself by prayer and meditation 通过祈祷和冥想增强自己的信念.
2 [Tn usu passive 通常用於被动语态]
increase the nutritional value of (a variety of food) by adding vitamins （添加维生素）增加（食物的）营养价值
cereal fortified with extra vitamins 强化营养麦片.