| Answer | Crossword Clue |
|---|---|
| ineffective | Not producing any significant or desired effect |
| ineffectual | Not producing any or the desired effect |
| inefficacious | Not producing the desired effect |
| efficacy | capacity for producing a desired result or effect; effectiveness |
| workable | Capable of producing the desired effect or result; practicable; feasible |
| readers | A machine for producing on a screen a magnified, readable image of any desired part of a microfiche or microfilm |
