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व्याकरणम् ॥ Vyakarana is described as the वेद पुरुष || Veda purusha's face.<blockquote>व्याक्रियन्ते शब्दाः अनेन इति व्याकरणम् । vyākriyante śabdāḥ anena iti vyākaraṇam । </blockquote>is the व्युत्पत्ति-अर्थः || vyutpatti artha or the subjective definition of word.

व्याकरणम् ॥ Vyakarana is described as the वेद पुरुष || Veda purusha's face.<blockquote>व्याक्रियन्ते शब्दाः अनेन इति व्याकरणम् । vyākriyante śabdāḥ anena iti vyākaraṇam । </blockquote>is the व्युत्पत्ति-अर्थः || vyutpatti artha or the subjective definition of word.

This shastra only deliberates on the शुद्धि-अशुद्धि || shuddhi-ashuddhi (accurate and inaccurate) usages of words in संस्कृतवाङ्मयम् || Sanskrita vangmaya (sanskrit literature). It is the grammar of संस्कृतश्लोकाः || sanskrit shlokas and it deals with the formation of words, different forms of the words and their combination, usage and semantic nuances. Although, ऋगवेद || Rigvedic references to grammar are available, it is only the तैत्तिरीयसंहिता || Taittireeya samhita that outlines the story of origin of grammar. In महर्षिः यास्कः || Maharshi Yaska's निरुक्त || Nirukta, different technical or conventional terms related to grammar are available in abundance.   

This shastra only deliberates on the शुद्धि-अशुद्धि || shuddhi-ashuddhi (accurate and inaccurate) usages of words in संस्कृतवाङ्मयम् || Sanskrita vangmaya (sanskrit literature). It is the grammar of संस्कृतश्लोकाः || sanskrit shlokas and it deals with the formation of words, different forms of the words and their combination, usage and semantic nuances. Although, ऋगवेद || Rigvedic references to grammar are available, it is only the तैत्तिरीयसंहिता || Taittireeya samhita that outlines the story of origin of grammar. In महर्षि यास्क || Maharshi Yaska's निरुक्तम् || Nirukta, different technical or conventional terms related to grammar are available in abundance.   

It was महर्षिः पाणिनिः || Maharshi Panini who has given [[Astadhyayi|अष्टाध्यायी ''<nowiki>|| Ashtadhyayi</nowiki>'']] the most profound and brilliant treatise on grammar to the intellectual world, wherein he describes all the previous grammarians belonging to a time period before him.  Also called शब्दानुशासनम् || Shabdanushasana it was the Astadhyayi which brought about the regularization of grammatical rules of the vedic usages also.  

It was महर्षिः पाणिनिः || Maharshi Panini who has given [[Astadhyayi|अष्टाध्यायी ''<nowiki>|| Ashtadhyayi</nowiki>'']] the most profound and brilliant treatise on grammar to the intellectual world, wherein he describes all the previous grammarians belonging to a time period before him.  Also called शब्दानुशासनम् || Shabdanushasana, it was the Astadhyayi which brought about the regularization of grammatical rules of the vedic usages also.  

Vyakarana is divided into प्राचीनव्याकरणम् || Pracheena vyakarana and नव्यव्याकरणम् || navya vyakarana.  Later age grammarians recognize the eight व्याकरणशास्त्रप्रवर्तकाः || vyakarana shastra pravartakas as follows<blockquote>इन्द्रश्चन्द्रः काशकृत्स्नापिशली शाकटायनः  । पाणिन्यमरजैनेन्द्राः जयन्त्यष्टौ च शाब्दिकाः ॥ </blockquote><blockquote>indraścandraḥ kāśakṛtsnāpiśālī śākaṭāyanaḥ । pāṇinyamarajainendrāḥ jayantyaṣṭau ca śābdikāḥ ॥</blockquote>इन्द्रः || Indra, चन्द्रः || Chandra, काशः || Kasha, कृत्स्नापिशली || kritsnapishali, शाकटायनः || shakatayana, पाणिनिः || panini, अमरजैनेन्द्रः || arajainendra, जयन्तः || jayanta are the eight preachers of शब्दः || shabda (word) or grammar.

Vyakarana is divided into प्राचीनव्याकरणम् || Pracheena vyakarana and नव्यव्याकरणम् || navya vyakarana.  Later age grammarians recognize the eight व्याकरणशास्त्रप्रवर्तकाः || vyakarana shastra pravartakas as follows<blockquote>इन्द्रश्चन्द्रः काशकृत्स्नापिशली शाकटायनः  । पाणिन्यमरजैनेन्द्राः जयन्त्यष्टौ च शाब्दिकाः ॥ </blockquote><blockquote>indraścandraḥ kāśakṛtsnāpiśālī śākaṭāyanaḥ । pāṇinyamarajainendrāḥ jayantyaṣṭau ca śābdikāḥ ॥</blockquote>इन्द्रः || Indra, चन्द्रः || Chandra, काशः || Kasha, कृत्स्नापिशली || kritsnapishali, शाकटायनः || shakatayana, पाणिनिः || panini, अमरजैनेन्द्रः || arajainendra, जयन्तिः || jayanti are the eight preachers of शब्दः || shabda (word) or grammar.

=== निरुक्तम् ॥ Nirukta ===

=== निरुक्तम् ॥ Nirukta ===

महर्षि यस्क || Maharshi Yaska's निरुक्तम् || Nirukta is another treasure that has been produced in भारतवर्ष || Bharatavarsha and given to the world. It is an excellent treatise that deals with etymology or the objective definition of words. निरुक्तम् || Nirukta is written in prose form while all other shastras are built in the सूत्र || sutra format. सायनाचार्य || [[Sayanacharya (सायनाचार्यः)|Saayanaacharya]] while giving the preface of ऋग्वेद भाष्यं || Rigveda Bhasyam speaks thus about निरुक्तम् || Niruktam :  <blockquote>अथावबोधे निरपेक्षतया पदजातं यत्रोक्तं तन्निरुक्तम् ।</blockquote>When other वेदाङ्ग || Vedangas extol the material aspects or तत्व || tattvas of Vedas, निरुक्तम् || Nirukta propounds the supernatural or the uncommon aspects or तत्व || tattvas of the Vedas.   

महर्षि यस्क || Maharshi Yaska's निरुक्तम् || Nirukta is another treasure that has been produced in भारतवर्ष || Bharatavarsha and given to the world. It is an excellent treatise that deals with etymology or the objective definition of words. निरुक्तम् || Nirukta is written in prose form while all other shastras are built in the सूत्र || sutra format. सायनाचार्य || [[Sayanacharya (सायनाचार्यः)|Saayanaacharya]] while giving the preface of ऋग्वेद भाष्यं || Rigveda Bhasyam speaks thus about निरुक्तम् || Niruktam :  <blockquote>अथावबोधे निरपेक्षतया पदजातं यत्रोक्तं तन्निरुक्तम् ।</blockquote>When other वेदाङ्ग || Vedangas extol the material aspects or तत्व || tattvas of Vedas, निरुक्तम् || Nirukta propounds the supernatural or the uncommon aspects or तत्व || tattvas of the Vedas.