Veda Vijnaana Vishtaram

वेद विज्ञान विष्टरम् - संस्कृत विभागः

सङ्ख्या विज्ञानम् - Numbers

पूरणप्रत्ययः संख्यां पूरयति। दशमभागस्य पूरणेन दश संख्या भवति। नोचेत् नव हि भवति।

(Purana Pratyaya completes the number. Example: Addition of the 10th part, completes the number 10, which otherwise would remain nine only.

Praatipadikam Core Noun (All nouns Including Pronoun, Collective Noun, Proper Noun, Common Noun)

प्रातिपदिकम् - अर्थव-दधातु-रप्रत्ययः प्रातिपदिकम्

अर्थवत्, अधातुः, अप्रत्ययः, प्रातिपदिकम्।

Praatipadikam is the core noun, manifest in 3 genders. Conditions to calssify a word as Praatipadikam (Noun) are:

1)  Should be Meaningful,  2) Should not be a verb, 3) Should not be pre-fix/ suffix or a word ending with them.