Definition of indispensable:
intrinsic, congenital, native, inherent, inhering, basic, critical, substantive, of necessity, all-important, needful, immanent, ingrained, at all costs, inbred, without fail, indwelling, natural, obligatory, crucial, necessitous, inborn, study at essential, innate, important, internal, inwrought, inseparable, vital, integral, needed, infixed, of the essence, essential, subjective, must-have.
- obligatory (part of speech: adjective)
- required (part of speech: adjective)
- "Antony Gray,--Gardener", Leslie Moore.
- "The Complete Historical Romances of Georg Ebers", Georg Ebers.
- "Bijou", Gyp.