उदुम्बरः; पृषोदरादित्वादेवोकार देश; यद्वा उदुम्बरमनाद्यम्; तेन तदात्मना विश्वं पोषयन् उदुम्बरः, 'ऊर्जा अन्नायमुदुम्बरम्' इति श्रुतेः; न्यग्रोधोदुम्बर इत्यत्र वि सर्गलोपे संधिरार्षः ।श्वोऽपि न स्थातेति अश्वत्थः ।पृषोदरादित्वादेव सकारस्य तकारादेश: ; 'ऊर्ध्वमूलोऽवाक्शाख एषोऽश्वत्थः सनातन : ' इति श्रुतेः, 'ऊर्ध्वमूलमधःशाखमश्वत्थं प्राहुरव्ययम्' इति स्मृतेश्च ।चाणूरनामानमन्धं निषूदितवानिति चाणूरान्धनिषूदनः ॥
In plain words
Udumbara: Derived through irregular phonetic rules with the substitution of the vowel 'u'; or because he sustains the entire universe in the primordial form of the udumbara tree, as scripture declares: 'Udumbara is vital energy for nourishment.' In the pairing 'nyagrodhodumbara', the omission of the visarga is an archaic poetic sandhi. Asvattha: Named because it will not endure even until tomorrow; formed via irregular rules with 't' replacing 's'. As scripture states: 'This is the eternal pipal tree with its roots above and branches below,' and the Bhagavad Gita confirms: 'They speak of the imperishable pipal tree whose root is above and branches below.' Canuranandhinisudana: The slayer of the wrestler Canura and other demonic foes.
Close to the Sanskrit
Udumbara: Derived through the pṛṣodarādi rule with the substitution of the vowel 'u'; or because he nourishes the universe in that unbeginning form of the Udumbara tree, according to the shruti 'Udumbara is vital energy for food.' In the compound 'nyagrodhodumbara', the omission of visarga follows an archaic Vedic sandhi rule. Asvattha: Because it will not endure even until tomorrow (na śvo'pi sthāsyati); formed via pṛṣodarādi with the substitution of 't' for 's'; according to the shruti 'This is the eternal Aśvattha tree whose roots are above and branches below,' and the Smriti statement 'Sages speak of the imperishable Aśvattha tree whose root is above and branches below.' Canuranandhinisudana: Because he destroyed the demon named Canura and others.