महाभारतः mahābhārataḥ - book-4, chapter-59, verse-4

प्रध्माय शङ्खं गाङ्गेयो धार्तराष्ट्रान्प्रहर्षयन् ।
प्रदक्षिणमुपावृत्य बीभत्सुं समवारयत् ॥४॥

4. pradhmāya śaṅkhaṁ gāṅgeyo dhārtarāṣṭrānpraharṣayan ,
pradakṣiṇamupāvṛtya bībhatsuṁ samavārayat.

4. प्रध्माय शङ्खं गाङ्गेयः धार्तराष्ट्रान्
प्रहर्षयन् प्रदक्षिणम् उपावृत्य बीभत्सुं समवारयत्

4. Having loudly blown his conch and delighted the sons of Dhritarashtra, Bhishma, the son of Ganga, circled clockwise and then checked Bibhatsu (Arjuna).

Words meanings summery:

• प्रध्माय (प्रध्माय) - having loudly blown (having blown loudly, having sounded)

• शङ्खं (शङ्खं) - his conch (conch, a conch-shell)

• गाङ्गेयः (गाङ्गेयः) - Bhishma (the son of Ganga) (son of Ganga, Bhishma)

• धार्तराष्ट्रान् (धार्तराष्ट्रान्) - the Dhritarashtras (sons of Dhritarashtra) (sons of Dhritarashtra)

• प्रहर्षयन् (प्रहर्षयन्) - delighting (gladdening, causing joy, making happy)

• प्रदक्षिणम् (प्रदक्षिणम्) - clockwise (clockwise, auspiciously, respectfully)

• उपावृत्य (उपावृत्य) - having circled (having turned, having come back, having approached)

• बीभत्सुं (बीभत्सुं) - Bibhatsu (Arjuna) (Bibhatsu (Arjuna's epithet))

• समवारयत् (समवारयत्) - he stopped (he stopped, he restrained, he warded off)

Words meanings and morphology

प्रध्माय (प्रध्माय) - having loudly blown (having blown loudly, having sounded)

(indeclinable)

absolutive (gerund)

Formed from upasarga pra- and root √dhmā (to blow) with -ya suffix.

Prefix: pra

Root: dhmā (class 1)

शङ्खं (शङ्खं) - his conch (conch, a conch-shell)

(noun)

Accusative, masculine, singular of शङ्ख

śaṅkha - conch, conch-shell

गाङ्गेयः (गाङ्गेयः) - Bhishma (the son of Ganga) (son of Ganga, Bhishma)

(proper noun)

Nominative, masculine, singular of गाङ्गेय

gāṅgeya - son of Ganga (an epithet for Bhishma)

Patronymic derived from Gaṅgā with the ḍhak (eya) suffix.

धार्तराष्ट्रान् (धार्तराष्ट्रान्) - the Dhritarashtras (sons of Dhritarashtra) (sons of Dhritarashtra)

(noun)

Accusative, masculine, plural of धार्तराष्ट्र

dhārtarāṣṭra - son of Dhritarashtra, descendant of Dhritarashtra

Patronymic derived from Dhṛtarāṣṭra with the aṇ suffix.

प्रहर्षयन् (प्रहर्षयन्) - delighting (gladdening, causing joy, making happy)

(adjective)

Nominative, masculine, singular of प्रहर्षयत्

praharṣayat - gladdening, causing delight, exhilarating

Present Active Participle

Causative form of pra-√hṛṣ (to rejoice) with śatṛ suffix.

Prefix: pra

Root: hṛṣ (class 1)

प्रदक्षिणम् (प्रदक्षिणम्) - clockwise (clockwise, auspiciously, respectfully)

(indeclinable)

Used adverbially here. The base can be a tatpurusha compound of pra- (forward/towards) and dakṣiṇa (right).

Compound type : tatpurusha (pra+dakṣiṇa)

• pra – forth, forward, very, intensely
  prefix
• dakṣiṇa – right (side), southern, able, clever
  noun/adjective (neuter)

उपावृत्य (उपावृत्य) - having circled (having turned, having come back, having approached)

(indeclinable)

absolutive (gerund)

Formed from upasargas upa- and ā- and root √vṛt (to turn, revolve) with -ya suffix.

Prefixes: upa+ā

Root: vṛt (class 1)

बीभत्सुं (बीभत्सुं) - Bibhatsu (Arjuna) (Bibhatsu (Arjuna's epithet))

(proper noun)

Accusative, masculine, singular of बीभत्सु

bībhatsu - Bibhatsu (Arjuna's epithet, meaning 'one who inspires disgust or aversion' in enemies), disgusted, hateful

समवारयत् (समवारयत्) - he stopped (he stopped, he restrained, he warded off)

(verb)

3rd person , singular, active, past imperfect (laṅ) of सम्वारयत्

Causative form of sam-√vṛ (to cover, enclose).

Prefix: sam

Root: vṛ (class 5)