Slightingly

Huſh, Siſter! Huſh! ſaid he: I vvill not bear to hear her ſpoken ſlightingly of! 'Tis enough, that to oblige your violent and indecent Caprice, you make me compromiſe vvith you thus.

Source: wiktionary

After having talked ſlightingly of muſick, he vvas obſerved to liſten very attentively vvhile Miſs Thrale played on the harpſichord, […]

Source: wiktionary

"I am astonished, my dear," said Mrs. Bennet, "that you should be so ready to think your own children silly. If I wished to think slightingly of anybody's children, it should not be of my own however."

Source: wiktionary

In order to enter with more discrimination into the style of our different authors, read often "Blair's Lectures." They are, I believe, sometimes spoken slightingly of by men of learning; I, however, as an unlearned man, think them particularly useful.

Source: wiktionary