Read the dictionary definition of unfriendly. All definitions for this word.
1. not disposed to friendship or friendliness
1. an unfriendly coldness of manner
2. an unfriendly action to take
2. not easy to understand or use
1. user-unfriendly
3. very unfavorable to life or growth
1. a hostile climate
2. an uncongenial atmosphere
3. an uncongenial soil
4. the unfriendly environment at high altitudes
4. not friendly
1. an unfriendly act of aggression
2. an inimical critic