ef-

a result or outcome; the influence of something

energy used to do something; a serious attempt

Producing the intended result; successful and operative

Making good use of resources without waste; capable and competent

A number multiplied by a variable; a value measuring a property

The power to produce a desired result

In an efficient manner, with minimal waste

Not producing the desired result; failing to work

Not working productively; wasteful of resources

Without difficulty or visible effort

Waste of time or resources without good results

Liquid waste discharged into water; flowing outward

Done with no apparent difficulty

Producing the desired or intended effect; effective

Expressing feelings in an exaggerated, overly enthusiastic way

An unrestrained outpouring of emotion or liquid

To erase or wipe out; to make inconspicuous

In a wasteful or unproductive manner

In a way that fails to achieve the desired result

Requiring or showing considerable effort

Erasing or wiping out; making oneself inconspicuous

Lack of ability to produce a desired effect

Foul-smelling or harmful gaseous emissions

To pour out or emit; to gush with enthusiasm