unfriendly

“an unfriendly act of aggression”

“an unfriendly coldness of manner”

“an unfriendly action to take”

Synonyms: incompatible, uncongenial
not suitable to your tastes or needs; beetle-browed, scowling
sullen or unfriendly in appearance; chilly
lacking warmth of feeling; uncordial
lacking warmth or friendliness; unneighborly, unneighbourly
not exhibiting the qualities expected in a friendly neighbor; inhospitable
not hospitable; hostile
characterized by enmity or ill will; unsociable
not inclined to society or companionship; cool
psychologically cool and unenthusiastic; unfriendly or unresponsive or showing dislike

Antonyms:: friendly
characteristic of or befitting a friend; congenial
suitable to your needs; affable, amiable, cordial, genial
diffusing warmth and friendliness; chummy, matey, pally, palsy-walsy
(used colloquially) having the relationship of friends or pals; companionate
like a companion; comradely, hail-fellow, hail-fellow-well-met
heartily friendly and congenial; couthie, couthy
(chiefly Scottish) agreeable and genial; cozy, informal, intimate
having or fostering a warm or friendly and informal atmosphere; neighborly, neighbourly
exhibiting the qualities expected in a friendly neighbor; social
marked by friendly companionship with others; gracious
characterized by charm, good taste, and generosity of spirit; hospitable
disposed to treat guests and strangers with cordiality and generosity; amicable
characterized by friendship and good will; social
living together or enjoying life in communities or organized groups; sociable
inclined to or conducive to companionship with others; warm
psychologically warm; friendly and responsive; show more antonyms...

“the unfriendly environment at high altitudes”

“user-unfriendly”

DEFINITIONS OF: unfriendly