This word is not acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. Alternative spelling of user-friendly.

"I would like to express my appreciation to all those who have provided impulses and constructive criticism, in particular the members of the GATE Biogas Extension Program, whose ideas concerning "userfriendly" biogas plants have yielded valuable impetus."

unfriendly