in-appreciative (adjective) thankless: unappreciative, inconsiderate (in behavior)
Sinonime: amiable,
amicable,
approachable, benevolent,
benign, breezy,
civil, clubby,
congenial, cordial,
courteous,
genial,
gentle, good-humored, good-natured, gracious, kindly, mild, nice, obliging,
pleasant,
polite,
sociable,
urbane,
warmAntonime: complaining,
disdainful, grouchy, grumbling, impolite,
miserable,
reserved,
surly,
unfriendly