Answer: coldest

AnswerCrossword Clue
COLDEST

Least cordial

COLDEST

Least responsive

COLDEST

Least friendly

COLDEST
Like Pluto, among the planets
COLDEST
Maximally unfriendly
COLDESTMost unfriendly.
COLDESTMost unresponsive.
COLDESTLeast emotional
COLDESTLeast warm
COLDESTAlaska, compared to other states