An enemy.
not disposed to friendship or friendliness
"an unfriendly coldness of manner"
"an unfriendly action to take"
very unfavorable to life or growth
"a hostile climate"
"an uncongenial atmosphere"
"an uncongenial soil"
"the unfriendly environment at high altitudes"
Not friendly; hostile; mean.
in an unkind or unfriendly manner; not as a friend