Prerequisite
Essential
Synonyms: Necessary condition, condition, requirement, necessity, qualification, basic, obligation, sine qua non, precondition, essential, requisite, proviso, imperative, rudiment, duty, and must.
Imperative
Synonyms: Necessary, required, essential, vital, of the essence, imperative, mandatory, de rigueur, needed, called for, requisite, basic, indispensable, obligatory, compulsory, and needful.
Example Sentences
A driver’s license is a prerequisite for the job.
Passing the exam is a prerequisite for graduation.
Basic math is a prerequisite for this course.
A good attitude is a prerequisite for success.
English 101 is a prerequisite for English 201.
Safety training is a prerequisite for entering the lab.
Experience is a prerequisite for the position.
A passport is a prerequisite for international travel.
Physical fitness is a prerequisite for firefighters.
The course has no prerequisites.