(noun, adjective)


1. not easy to understand or use

- user-unfriendly

2. not disposed to friendship or friendliness

- an unfriendly coldness of manner

- an unfriendly action to take

Similar word(s): incompatible, uncongenial, scowling, chilly, uncordial, unneighborly, unneighbourly, inhospitable, hostile, unsociable, cool

3. not friendly

- an unfriendly act of aggression

Similar word(s): hostile, inimical

4. very unfavorable to life or growth

- the unfriendly environment at high altitudes

Similar word(s): inhospitable, hostile, uncongenial


1. An enemy.