Dulciloquence

Be that as it may, certain it is, that Kemble performed both at Leicester and Gloucester, and from thence proceeded to Cheltenham, where, in conjunction with a Mr. Carlton, he produced a nouvelle entertainment; i. e. a lecture upon eloquence, by himself, and sleight of hand tricks by his coadjutor. This is perhaps the only instance on record where dulciloquence and legerdemain went hand in hand.

Source: wiktionary

I dutifully trailed along behind Andre for a few days before being trusted to take the lead role on some sales calls. Lacking his francophone dulciloquence, however, and having a hitch in my style born of ethical hesitations, I failed to sell a single calculator.

Source: wiktionary

I cannot fairly pretend such assessments to be devoid of any merit whatsoever, and I confess that I have not sought to propitiate anyone by way of my dulciloquence, since I very much regard any standard of agreeability as intrinsically dangerous to the amelioration of the ideas that must matter within the field of comparative law.

Source: wiktionary