adjective
1. : capable of winning favor : pleasing
ingratiating smile
we are prone to respond to art works … in terms of their ingratiating effect — H.E.Clurman
2. : intended or adopted in order to gain favor : pleasantly persuasive : flattering
her manner is quiet and ingratiating and a little too agreeable — Gordon Bottomley
ingratiating manner … one does not think compatible with deep spiritual experience — W.B.Yeats
some of his superiors were even younger than he, but it's possible that they were also more ingratiating and discreet — L.M.Hughes