Reserved — unfriendly (11)
I believe the answer is:
standoffish
I believe this is a double definition.
'reserved' is the first definition.
(thesaurus)
'unfriendly' is the second definition.
(synonyms)
(Other definitions for standoffish that I've seen before include "Cool" , "Distant" , "like a half of rugby?" , "Reserved, aloof" , "Unfriendly" .)