from
The Collaborative International Dictionary of English v.0.48
Requisite \Req"ui*site\, a. [L. requisitus, p. p. requirere;
pref. re- re- + quaerere to ask. See {Require}.]
Required by the nature of things, or by circumstances; so
needful that it can not be dispensed with; necessary;
indispensable.
[1913 Webster]
All truth requisite for men to know. --Milton.
[1913 Webster]
Syn: Necessary; needful; indispensable; essential.
[1913 Webster] -- {Req"ui*site*ly}, adv. --
{Req"ui*site*ness}, n.
[1913 Webster]