Indispensable
Synonyms: Essential, necessary, vital, required, requisite, all-important, of the utmost importance, of the essence, life-and-death, mandatory, obligatory, urgent, burning, paramount, high-priority, consequential, crucial, key, needed, called for, important, vitally important, of great consequence, critical, imperative, compulsory, compelling, pressing, acute, pre-eminent, and significant.
Example Sentences
Water is indispensable for life on Earth.
She became an indispensable part of the team.
A reliable internet connection is indispensable for remote work.
His advice was indispensable during the difficult decision-making process.
Good communication is indispensable for a successful relationship.