whinny
/ˈhwɪni/Definitions
1. noun
the high-pitched sound made by a horse, especially a nervous or excited one
“The little filly let out a loud whinny as she sensed the presence of her favorite treat.”
2. verb
to make the high-pitched sound typical of a horse, especially a nervous or excited one
“The nervous horse began to whinny loudly and pace back and forth in its stall.”