ne·ces·si·tate 
/nɪˈsɛsəˌteɪt/ verb
ne·ces·si·tates; ne·ces·si·tat·ed; ne·ces·si·tat·ing /nɪˈsɛsəˌteɪt/ verb [+ obj] formal : to make (something) necessary
▪ New safety regulations necessitated adding a railing to the stairs.
▪ New safety regulations necessitated adding a railing to the stairs.
