Adjective

(en adjective)

Incapable of producing results; useless; not successful; not worth attempting.

*

, title=(The Celebrity), chapter=4 , passage=No matter how early I came down, I would find him on the veranda, smoking cigarettes, or

*

*:There is an hour or two, after the passengers have embarked, which is disquieting and fussy.Stewards, carrying cabin trunks, swarm in the corridors. Passengers wander restlessly about or hurry, with futile energy, from place to place.

*{{quote-news, year=2011, date=December 15, author=Marc Higginson, work=BBC Sport

, title= Shamrock Rovers 0-4 Tottenham , passage=Goals from Steven Pienaar, Andros Townsend, Jermain Defoe and Harry Kane sealed the win, but Rubin Kazan's 1-1 draw against PAOK Salonika rendered Spurs' efforts futile .}}

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.