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.