1
general::
adj. VERBS appear, be, look, seem | become ADV. distinctly, extremely, really, very a distinctly unfriendly tone of voice | rather | environmentally the use of environmentally unfriendly products (= that harm the environment) PREP. to She was really unfriendly to me.
Oxford Collocations Dictionary
2
general::
person/voice/behaviour
unfriendly/not friendly
behaving towards someone in a way that shows you are not interested in them or are not ready to talk to them or help them:
• The hotel staff were unfriendly and unhelpful. • an unfriendly tone of voice • They didn't seem very friendly to strangers. • She gave him an unfriendly glance.
hostile
very unfriendly, and ready to argue or fight:
• He was openly hostile towards me when I arrived. • A hostile crowd gathered oustide the US embassy.
cold
behaving towards other people as if you do not like them or care about them:
• He gave her a cold stare. • a cold voice
frosty
unfriendly, especially because you are angry with someone:
• When she spoke, her tone was frosty. • He got a frosty reception from his wife when he finally returned home (= she was not very friendly towards him ) .
aloof
[ not before noun ] not wanting to talk to other people or spend time with them, especially because you think you are better than them:
• Some politicians are criticized for being too aloof.
antagonistic
unfriendly and always trying to start arguments with someone:
• Why are Kate and John so antagonistic towards each other?
antisocial
not interested in meeting other people or forming friendly relationships with them:
• Sorry if I'm being antisocial, but I need to get my work done. • He was an antisocial loner with no friends.
place/organization
unfriendly
making you feel as though you are not wanted:
• The report found that the Church can seem unfriendly to outsiders.
unwelcoming
unfriendly - used especially about the physical characteristics or appearance of something:
• The entrance to the factory is cold, bare, and unwelcoming. • The new fence is just one example of the city’s attempt to make public spaces unwelcoming to the homeless.
impersonal
lacking the normal friendly relations between people who work or do business together:
• I had no desire to work for a large impersonal organization. • They just handed over the keys and walked out – it was all so impersonal.
forbidding
unfriendly, uncomfortable, and a little frightening, so that you do not want to go there:
• The school was a rather forbidding building surrounded by a high steel fence.
Longman-Thesaurus