unaffectionate
adjective
un·af·fec·tion·ate
ˌən-ə-ˈfek-sh(ə-)nət
: not showing affection or fondness : not affectionate
lived with an unaffectionate aunt
an unaffectionate nickname
unaffectionately
adverb
… the chronically tardy Metro No. 8—unaffectionately known as the "Late" …
—The Seattle Times
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Merriam-Webster unabridged
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