In a manner that dismisses, rejects, or shows contempt; in a way that suggests something is unimportant or unworthy of consideration.
From dismiss + -ing (present participle) + -ly (adverb suffix), creating an adverb meaning 'in a dismissing manner'; follows standard English adverb formation.
This adverb is rare but powerful—when you say someone spoke 'dismissingly,' you're not just saying they dismissed something, but that their tone itself conveyed contempt, making the manner-of-action itself the main message.
Complete word intelligence in one call. Free tier — 50 lookups/day.