Prerequisite(adjective)
Made necessary by particular circumstances or regulationss.
Hindi meaning:आवश्यक
Synonyms: Mandatory, Indispensable, Obligatory, Requisite
Antonyms: Optional, Non-Compulsory, Unessential, Expendable
Example: He possessed all the pre-requisite skills required for this job.
Trick to remember: Job lene ke liye skills ka hona prerequisite h. 
