1. (

• unfriendly ,

) not easy to understand or use; "user-unfriendly" ;

2. (

• unfriendly ,

) not disposed to friendship or friendliness; "an unfriendly coldness of manner"; "an unfriendly action to take" ;

3. (

• unfriendly ,
• inimical

) not friendly; "an unfriendly act of aggression"; "an inimical critic" ;

4. (

• hostile ,
• uncongenial ,
• unfriendly

) very unfavorable to life or growth; "a hostile climate"; "an uncongenial atmosphere"; "an uncongenial soil"; "the unfriendly environment at high altitudes" ;