Actually, the root morpheme of the word "disinterestedly" is not "interest," but rather "disinterested." The root morpheme is the core element of a word from which other related words can be derived. In this case, "disinterested" is the root morpheme, and it means unbiased or impartial. The suffix "-ly" has been added to form an adverb, resulting in "disinterestedly," which means doing something in an unbiased or impartial manner. However, it's important to note that "disinterestedly" is often confused with "uninterestedly," as the meanings are quite similar.
