निःस्फुर्niḥsphurP. -स्फुर्/अति, to jerk or hurl away RV.
Parasmaipada -स्फुर्/अति, to jerk or hurl away fg-veda
कोशःDictionaries
Every entry for a word in Apte, Monier-Williams, Macdonell and the Dhātupāṭha, with their abbreviations spelled out, and an analysis of its forms.