Without showing appreciation. Ungratefully(adverb)
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Use "unappreciatively" in a sentence
"Chuck grunted unappreciatively, and marched past her."
"What we have really been witnessing, however unappreciatively, in this country has been a thrilling and bloodless battle of Kulturs."
"She touched each cup caressingly in passing; and that which she found in the mirror, too, she regarded not unappreciatively, from varying angles ...."