prerequisite

Must-have before starting

A prerequisite is something required beforehand—a condition that must be met before proceeding.

Courses have prerequisites: Calculus is a prerequisite for physics.

Jobs list prerequisites in their requirements.

The word works as both noun and adjective: prerequisite knowledge, prerequisite skills.

Prerequisites establish that certain foundations must exist before building further.

requirement

qualification

Required skill or condition

precondition · necessity · requisite · mandate · obligation · provision · condition · threshold · standard · specification

precursor

antecedent

Something that precedes

preamble · prelude · introduction · lead-in · first step · gateway · predecessor · prior knowledge · intro class

essential

necessity

Indispensable requirement

vital · crucial · mandatory · obligatory · non-negotiable · sine qua non · key · critical · needed · fundamental

foundation

groundwork

Foundational preparation for something

  • basisUnderlying support or principle
  • baseSupporting bottom structure
  • cornerstoneFoundational building block

bedrock · underpinning · framework · footing · starting point · springboard · preparation · background · grounding · fundamentals

Categories
Opposites
requirement status

prerequisiteoptional

Not mandatory

elective · voluntary · discretionary · unnecessary · nonessential

temporal/logical sequence

prerequisiteconsequence

Result of an action

result · outcome · sequel · aftermath · byproduct

essentiality

prerequisitesuperfluous

Exceeding what suffices

extra · nonessential · inessential · dispensable · supplementary

Phrases
Family

prerequisites

Familiarity
Top 50,000
Profile
Used worldwide · Timeless · Abstract · Everyday, not technical · Rated G