defend

dɪˈfɛnd

verb

resist an attack made on (someone or something); protect from harm or danger.

we shall defend our island, whatever the cost

protect,guard,safeguard,keep from harm,preserve,secure,shield,shelter,screen,fortify,garrison,barricade,fight for,uphold,support,be on the side of,take up cudgels for,watch over,be the defender of