Английский разговорный словарь (основной) - indispensable
Indispensable
indispensable
ˌɪndɪsˈpensəbl adj. 1 (often foll. by to, for) thatcannot be dispensed with; necessary. 2 (of a law, duty, etc.) that is not to be set aside. øøindispensability n. indispensableness n. indispensably adv. [med.L indispensabilis (as IN-(1), DISPENSABLE)]