"user-unfriendly"
"an unfriendly coldness of manner""an unfriendly action to take"
"an unfriendly act of aggression""an inimical critic"
"a hostile climate""an uncongenial atmosphere""an uncongenial soil""the unfriendly environment at high altitudes"
牛津高阶第八版
美国韦氏词典
Dictionary.com
Free Dictionary
维基百科 (自由的百科全书)