- unapproachable - discouraging intimacies; reserved; "an unapproachable executive"
Antonyms: approachable, accessible
- unapproachable, unreachable, unreached, out of reach - inaccessibly located or situated; "an unapproachable chalet high in the mountains"; "an unreachable canyon"; "the unreachable stars"
Antonym: accessible (indirect, via inaccessible)