Not affable; reserved in social intercourse.(adjective)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "inaffable" in a sentence
"I admit that even among amateurs this is rather small talk, but it brings me to this point: in the passage of water down a ravine of its own making, this line of Nature astir may repeat itself again and again but is commonly too inaffable, abrupt, angular, to suggest the ogee."