10-Letter Words Containing: F,F,Y

• a drink made of beer and lemonade

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

• skillfulness in avoiding wasted time and effort

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

• a lack of efficacy

• an effort that is inconvenient

• the quality of being almost beyond one's ability to deal with and requiring a great effort to achieve a positive result

• in a faithful manner

• in an effusive manner

• in an affected manner