IPA: /ˈsnæpɪʃli/
KK: /ˈsnæpɪʃli/
In a way that is quick and sharp, often showing irritation or impatience.
She replied snappishly when I asked her to help me.
Snappishly → It is formed from "snap" (of uncertain origin, possibly imitative of the sound made) and the suffix "-ishly" (meaning in a manner of). The word "snappishly" describes a manner of speaking that is sharp or curt, akin to a quick, snapping sound.
Think of someone speaking in a sharp or curt way, like a quick 'snap' — that's what 'snappishly' means.