12-Letter Words Containing: I,F,F,I,E,S,_

• to a sufficient degree

• affirming or giving assent

• a reply of affirmation

• expecting the best

• expressing or manifesting praise or approval

• a composite speech sound consisting of a stop and a fricative articulated at the same point (as `ch' in `chair' and `j' in `joy')

• having some official authority or sanction

• arouse hostility or indifference in where there had formerly been love, affection, or friendliness

• a constant number that serves as a measure of some property or characteristic

• a lack of efficacy

• the trait of being effeminate (derogatory of a man)

• the ratio of the output to the input of any system

• skillfulness in avoiding wasted time and effort