hav·oc 
/ˈhævək/ noun
/ˈhævək/ noun [noncount] : a situation in which there is much destruction or confusion
▪ the havoc of war ▪ A powerful tornado wreaked havoc on [=caused great destruction to] the small village. ▪ The disease can play havoc with the body's immune system. ▪ Several small children can create/cause havoc in a house.
▪ the havoc of war ▪ A powerful tornado wreaked havoc on [=caused great destruction to] the small village. ▪ The disease can play havoc with the body's immune system. ▪ Several small children can create/cause havoc in a house.
