"unapproachable" in the adjective sense
1. unapproachable
discouraging intimacies reserved
"an unapproachable executive"
2. unapproachable, unreachable, unreached, out of reach
inaccessibly located or situated
"an unapproachable chalet high in the mountains"
"an unreachable canyon"
"the unreachable stars"
Source: WordNet® (An amazing lexical database of English)
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