From origin perspective Vrtra is Tvaashtra, the son of Tvashtra. However, Vrtra has been defined by Yaska maharshi as follows <blockquote>तत्को वृत्रः। मेघ इति नैरुक्ताः । त्वाष्ट्रोऽसुर इत्यैतिहासिकाः । अपां च ज्योतिषश्च मिश्रीभावकर्मणो वर्षकर्म जायते । तत्रोपमार्थेन युद्धवर्णा भवन्ति । (Nirukta 2.16)<ref>[http://vedicreserve.mum.edu/nirukta/nirukta.pdf Nirukta]</ref></blockquote><blockquote>tatkō vr̥traḥ। mēgha iti nairuktāḥ । tvāṣṭrō'sura ityaitihāsikāḥ । apāṁ ca jyōtiṣaśca miśrībhāvakarmaṇō varṣakarma jāyatē । tatrōpamārthēna yuddhavarṇā bhavanti । (Nirukta 2.16)</blockquote>Meaning : Nirukta defines Vrtra as the cloud, which is a water body. A combination of water and lightning (electricity) gives rise to the process of rain and this process is used as a simili to describe a war. | From origin perspective Vrtra is Tvaashtra, the son of Tvashtra. However, Vrtra has been defined by Yaska maharshi as follows <blockquote>तत्को वृत्रः। मेघ इति नैरुक्ताः । त्वाष्ट्रोऽसुर इत्यैतिहासिकाः । अपां च ज्योतिषश्च मिश्रीभावकर्मणो वर्षकर्म जायते । तत्रोपमार्थेन युद्धवर्णा भवन्ति । (Nirukta 2.16)<ref>[http://vedicreserve.mum.edu/nirukta/nirukta.pdf Nirukta]</ref></blockquote><blockquote>tatkō vr̥traḥ। mēgha iti nairuktāḥ । tvāṣṭrō'sura ityaitihāsikāḥ । apāṁ ca jyōtiṣaśca miśrībhāvakarmaṇō varṣakarma jāyatē । tatrōpamārthēna yuddhavarṇā bhavanti । (Nirukta 2.16)</blockquote>Meaning : Nirukta defines Vrtra as the cloud, which is a water body. A combination of water and lightning (electricity) gives rise to the process of rain and this process is used as a simili to describe a war. |