dismissive
UK: dɪsˈmɪsɪv | US: dɪsˈmɪsɪv
adj. showing indifference or disregard; conveying a lack of interest or approval
adj. (of behavior or language) implying rejection or dismissal
The word "dismissive" originates from the Latin dimittere (dis- "apart" + mittere "to send"), which evolved into "dismiss" in English (meaning "to send away or reject"). The suffix -ive was added to form the adjective, implying a quality of sending away—figuratively expressing disregard or indifference. The logic traces back to the literal act of dismissing someone/something, later abstracted to describe attitudes or tones.
She gave a dismissive wave when asked about the rumors.
His dismissive tone made it clear he wasn’t interested in debating.
The manager’s dismissive attitude frustrated the team.
Critics were dismissive of the film’s simplistic plot.
Avoid using dismissive language in professional emails.