unfriendly

adjective

1. 1

   not disposed to friendship or friendliness

   an unfriendly coldness of manner

   an unfriendly action to take

2. 2

   not easy to understand or use

   user-unfriendly

3. 3

   very unfavorable to life or growth

   a hostile climate

   an uncongenial atmosphere

4. 4

   not friendly

   an unfriendly act of aggression

   an inimical critic