BhG 18.76

syntax

he rājan (O king!),
keśavārjunayoḥ (of Keśava and Arjuna) imam adbhutam puṇyam saṁvādam (this wonderful noble conversation) saṁsmṛtya saṁsmṛtya (after repeatedly remembering) muhuḥ muhuḥ (every moment) aham (I) hṛṣyāmi (I rejoice).

grammar

rājan	–	rājan 8n.1 m. – O king! (from: √raj – to reign);
saṁsmṛtya saṁsmṛtya	–	sam-√smṛ (to remember fully, to remind) absol. – after remembering (repetition meaning continuity);
saṁvādam	–	sam-vāda 2n.1 m. – conversation (from: sam-√vad – to speak together, to talk);
imam	–	idam sn. 2n.1 m. – this;
adbhutam	–	ad-bhuta 2n.1 m. – supernatural, marvellous, wonderful;
keśavārjunayoḥ	–	keśava-arjuna 6n.2 m.; DV: keśavasya ca arjunasya ceti – of Keśava and Arjuna (from: keśa – hair; -va = -vant – owner); or ka – Brahmā; īśa – ruler, lord, Śiva; -va = -vant – owner, ka-īśa-va – the lord of Brahmā and Śiva; arjuna – white, clear, Arjuna);
puṇyam	–	puṇya 2n.1 m. – good, meritorious, pious, pure (from: √pū – to purify, or √puṇ – to act piously);
hṛṣyāmi	–	√hṛṣ (to be excited) Praes. P 3v.1 – I rejoice;
ca	–	av. – and;
muhuḥ muhuḥ	–	av. – every moment (from: muhur – suddenly, at every moment, constantly; repetition meaning continuity);

textual variants

imam → idam (this);
adbhutam → uttamam (the highest);
hṛṣyāmi ca → hṛṣyāmīva (as if I rejoice);
muhuḥ muhuḥ → punaḥ punaḥ (again and again);

Śāṃkara

he rājan dhṛtarāṣṭra, saṃsmṛtya saṃsmṛtya pratikṣaṇaṃ saṃvādam imam adbhutaṃ keśavārjunayoḥ puṇyam imaṃ śravaṇenāpi pāpa-haraṃ śrutvā hṛṣyāmi ca muhur muhuḥ pratikṣaṇam

Rāmānuja

keśavārjunayor imaṃ puṇyam adbhutaṃ saṃvādaṃ sākṣāc chrutaṃ smṛtvā muhur muhur hṛṣyāmi

Śrīdhara

kiṃ ca rājann iti | hṛṣyāmi romāñcito bhavāmi harṣaṃ prāpnomīti vā | spaṣṭam anyat

Viśvanātha

commentary under the verse BhG 18.74

Baladeva

rājan dhṛtarāṣṭra puṇyaṃ śrotur avidyā-paryanta-sarva-doṣa-haram | muhur muhuḥ prati-kṣaṇaṃ hṛṣyāmi romāñcito ‚smi