Main entry: incident, incidental
Definition: (sometimes followed by `to') minor or casual or subordinate in significance or nature or occurring as a chance concomitant or consequence
Usage: incidental expenses; the road will bring other incidental advantages; extra duties incidental to the job; labor problems incidental to a rapid expansion; confusion incidental to a quick change
Antonyms: basic
Definition: pertaining to or constituting a base or basis
Antonyms: central
Definition: in or near a center or constituting a center; the inner area
Antonyms: primary
Definition: of first rank or importance or value; direct and immediate rather than secondary
Main entry: incidental, nonessential
Definition: not of prime or central importance
Usage: nonessential to the integral meanings of poetry- Pubs.MLA
Antonyms: necessary, necessity, essential, requirement, requisite
Definition: anything indispensable
Antonyms: essential
Definition: basic and fundamental
Main entry: resultant, attendant, accompanying, concomitant, consequent, ensuant, sequent, incidental
Definition: following or accompanying as a consequence
Usage: an excessive growth of bureaucracy, with attendant problems; snags incidental to the changeover in management; attendant circumstances; the period of tension and consequent need for military preparedness; the ensuant response to his appeal; the resultant savings were considerable
Antonyms: antecedent
Definition: preceding in time or order