necessitude
/nɪˈsɛsɪtjuːd/ /nɪˈsɛsɪtʃuːd/noun
The fact or condition of being in need; an instance of this; need; necessity. Now rare.
Origin
Early 17th century (in an earlier sense). From classical Latin necessitūdō relation or connection between persons or things, compulsion, constraint, neediness from necesse + -tūdō.