IPA: /ˈʌpˌstɛp/
KK: /ˈʌpˌstɛp/
A rise in pitch or tone that occurs between syllables or words in a language that uses tones to convey meaning.
In tonal languages, an upstep can change the meaning of a word entirely.
Upstep → It is formed from "up" (meaning higher or above) and "step" (from Old English "stæpe", meaning a movement or a pace). The word "upstep" means to take a step upward or to rise in position or status.
Think of moving "higher" with each "step" — that's what upstep means.