Adjective

(en adjective)

Equal to the end proposed; adequate to wants; enough; ample; competent; as,

We have provision sufficient for the family

This army is sufficient to defend the country.

There is not sufficient access to the internet in the some small country villages.

Possessing adequate talents or accomplishments; of competent power or ability; qualified; fit.

A two-week training course is sufficient to get a job in the coach-driving profession.

(archaic) Capable of meeting obligations; responsible.

* 1668 , (Samuel Pepys), December 23 1668

...to take the best ways we can, to make it known to the Duke of York; for, till Sir J. Minnes be removed, and a sufficient man brought into W. Pen's place, when he is gone, it is impossible for this Office ever to support itself.

self-sufficient; self-satisfied; content.

Adjective

(en adjective)

Necessary.

Very important; of high importance.

* {{quote-magazine, date=2013-05-17

, author=George Monbiot, authorlink=George Monbiot , title=Money just makes the rich suffer , volume=188, issue=23, page=19 , magazine=(The Guardian Weekly) citation , passage=In order to grant the rich these pleasures, the social contract is reconfigured. The welfare state is dismantled. Essential public services are cut so that the rich may pay less tax. […]}}

Being in the basic form; showing its essence.

Don’t mind him being grumpy. That’s the essential Fred.

Really existing; existent.

* Webster (1623)

Is it true, that thou art but a name, / And no essential thing?

Such that each complementary region is irreducible, the boundary of each complementary region is incompressible by disks and monogons in the complementary region, and no leaf is a sphere or a torus bounding a solid torus in the manifold.

(medicine) Idiopathic.