need

nouns

a condition requiring relief
"she satisfied his need for affection"; "God has no need of men to accomplish His work"; "there is a demand for jobs"
anything that is necessary but lacking
"he had sufficient means to meet his simple needs"; "I tried to supply his wants"
the psychological feature that arouses an organism to action toward a desired goal; the reason for the action; that which gives purpose and direction to behavior
"we did not understand his motivation"; "he acted with the best of motives"
a state of extreme poverty or destitution
"their indigence appalled him"; "a general state of need exists among the homeless"
is derived from

verbs

require as useful, just, or proper
"It takes nerve to do what she did"; "success usually requires hard work"; "This job asks a lot of patience and skill"; "This position demands a lot of personal sacrifice"; "This dinner calls for a spectacular dessert"; "This intervention does not postulate a patient's consent"
have need of
"This piano wants the attention of a competent tuner"
have or feel a need for
"always needing friends and money"