The Collaborative International Dictionary
Needful \Need"ful\ (n[=e]d"f[.u]l), a.
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Full of need; in need or want; needy; distressing. [Archaic]
--Chaucer.The needful time of trouble.
--Bk. of Com. Prayer. -
Necessary for supply or relief; requisite.
All things needful for defense abound.
--Dryden. [1913 Webster] -- Need"ful*ly, adv. -- Need"ful*ness, n.
Wiktionary
n. The property of being needful or necessary.
Usage examples of "needfulness".
Needless to say she is then likely to perform well, becoming, in effect, a piteous dream of needfulness on the sawdust, pleading to be purchased, begging to serve, fully, totally, as what she is, only a slave.
His eerie needfulness, his obscene hunger, was drowned in this tide of misery and self-hatred.