ingratiatory,a.|ɪnˈgreɪʃɪətərɪ| [f. ingratiate: see -ory.] That tends to ingratiate. 1865Cornh. Mag. Apr. 399 He spoke with a timid gentleness of tone, an ingratiatory smile.1881Ruskin Love's Meinie I. i. 26 You will find one of the robin's very chief ingratiatory faculties is his dainty and delicate movement.