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Efficable is not a f*cking word. It's the result of dumb ass people making vain attempts at intelligent speech. The correct word is efficacious.
Telling him about himself wouldn't be efficable or accomplish anything.
efficable by thedumass January 14, 2008

efficated 

This glass is efficated
efficated by Cockydick May 31, 2017

efficacious 

When trying to impress with his vocabulary by using the word 'efficacious' rather than 'effective', the man was actually more efficacious at sounding like an ass.
efficacious by dgeezy May 13, 2015

self-efficacy 

1. when a person believes in their own ability to complete a task.

2. when someone poops themself.
1. Self-efficacy led Stephanie to believe she could make good marks on the exam.

2. Stephanie was unable to finish the exam due to self-efficacy.
self-efficacy by WHUler February 25, 2010

efficace 

(eff-ee-kaas) efficient and effective. a single action that solves more than one problem or serves more than one purpose at once with minimal effort. elegant.

weakening an opponents position while strengthening your own in a single action, thereby doubling your advantage.
All his hard work and planning was outdone by the efficace of his opponent's actions.
efficace by cris clark February 22, 2007

efficascious 

Adj. describing a wildly unpopular person who scrutinizes over every move you make.
"Did the substitute write you up for talking?"

"yeah and she's an efficascious bitch for doing it, too."
efficascious by tenahj March 9, 2008