1》 required to be done, achieved, or present; needed.
2》 inevitable: a ~ consequence.
↘ Philosophy inevitably resulting from the nature of things, so that the contrary is impossible.
↘ Philosophy (of an agent) having no independent volition.
1》 ( necessaries ) the basic requirements of life, such as food and warmth.
2》 ( the ~ ) informal the action or item needed.
↘ Brit. informal the money required.
ME: from L. necessarius , from necesse 'be needful'.