1) Aloof 2) Distant 3) Inaccessible 4) Offish 5) Standoffish 6) Threatening 7) Unaccessible 8) Unreachable 9) Unreached 1) An unapproachable person 2) Discouraging intimacies 3) Offish 4) Remote 5) Reserved 6) Standoffish 
[adj] - discouraging intimacies 2. [adj] - inaccessibly located or situated
unreachable adjective inaccessibly located or situated; `an unapproachable chalet high in the mountains`; `an unreachable canyon`; `the unreachable stars`
not capable of being approached; remote; unreachable: an unapproachable spot; an unapproachable person. · impossible to equal or rival: unapproachable mastery of her art.
[SAT terms] discouraging intimacies; reserved