adjective

not candid or sincere, typically by pretending that one knows less about something than one really does.

he was being somewhat disingenuous as well as cynical

dishonest,deceitful,underhand,underhanded,duplicitous,double-dealing,two-faced,dissembling,insincere,false,lying,untruthful,mendacious,not candid,not frank,not entirely truthful,artful,cunning,crafty,wily,sly,sneaky,tricky,scheming,calculating,designing,devious,unscrupulous,shifty,foxy,economical with the truth,terminologically inexact,subtle,hollow-hearted,false-hearted,double-faced,truthless,unveracious