Manipulatively is an adverb that describes behavior that controls or influences others in a deceitful or underhanded way. Synonyms for manipulatively include calculatingly, deceptively, slyly, cunningly, trickily, craftily, shrewdly, duplicitously, insidiously, and Machiavellianly. These words all share a negative connotation that implies the use of dishonest or unethical tactics to achieve one's goals. Other synonyms might include manipulable, scheming, conniving, and artful. When using these words, it's important to consider the context in which they are being used, as some may be more appropriate in certain situations than others.