महाभारतः mahābhārataḥ - book-7, chapter-57, verse-20

ततः प्रणिहिते ब्राह्मे मुहूर्ते शुभलक्षणे ।
आत्मानमर्जुनोऽपश्यद्गगने सहकेशवम् ॥२०॥

20. tataḥ praṇihite brāhme muhūrte śubhalakṣaṇe ,
ātmānamarjuno'paśyadgagane sahakeśavam.

20. tataḥ praṇihite brāhme muhūrte śubhalakṣaṇe
ātmānam arjunaḥ apaśyat gagane sahakeśavam

20. tataḥ praṇihite brāhme śubhalakṣaṇe muhūrte
arjunaḥ ātmānam sahakeśavam gagane apaśyat

20. Then, at that auspicious, divine (brāhma) moment, Arjuna saw his self (ātman) in the sky together with Keśava.

Words meanings summery:

• ततः (tataḥ) - then, thereupon, from that

• प्रणिहिते (praṇihite) - fixed, directed, placed

• ब्राह्मे (brāhme) - divine, Brahmic, relating to Brahma/Brahman

• मुहूर्ते (muhūrte) - at the moment, in the instant

• शुभलक्षणे (śubhalakṣaṇe) - auspicious, having auspicious marks

• आत्मानम् (ātmānam) - his self (ātman) (self, soul, oneself)

• अर्जुनः (arjunaḥ) - Arjuna (proper name)

• अपश्यत् (apaśyat) - saw

• गगने (gagane) - in the sky, in the atmosphere

• सहकेशवम् (sahakeśavam) - with Keśava, accompanied by Keśava

Words meanings and morphology

ततः (tataḥ) - then, thereupon, from that

(indeclinable)

प्रणिहिते (praṇihite) - fixed, directed, placed

(adjective)

Locative, masculine, singular of praṇihita

praṇihita - fixed, directed, placed, composed

Past Passive Participle

Derived from root dhā, class 3, with prefixes pra-ni and kta suffix.

Prefixes: pra+ni

Root: dhā (class 3)

ब्राह्मे (brāhme) - divine, Brahmic, relating to Brahma/Brahman

(adjective)

Locative, masculine, singular of brāhma

brāhma - divine, holy, relating to Brahma or Brahman

मुहूर्ते (muhūrte) - at the moment, in the instant

(noun)

Locative, masculine, singular of muhūrta

muhūrta - a moment, a specific unit of time (48 minutes)

शुभलक्षणे (śubhalakṣaṇe) - auspicious, having auspicious marks

(adjective)

Locative, masculine, singular of śubhalakṣaṇa

śubhalakṣaṇa - having auspicious marks, auspicious, propitious

Compound type : Bahuvrihi (śubha+lakṣaṇa)

• śubha – auspicious, brilliant, good
  adjective (masculine/feminine/neuter)
• lakṣaṇa – mark, sign, characteristic
  noun (neuter)

आत्मानम् (ātmānam) - his self (ātman) (self, soul, oneself)

(noun)

Accusative, masculine, singular of ātman

ātman - self, soul, spirit, essence

अर्जुनः (arjunaḥ) - Arjuna (proper name)

(proper noun)

Nominative, masculine, singular of arjuna

arjuna - Arjuna (proper name); white, clear

अपश्यत् (apaśyat) - saw

(verb)

3rd person , singular, active, imperfect (laṅ) of dṛś

Imperfect Active Voice

3rd person singular imperfect active form of the root dṛś (with paśyādeśa), class 1.

Root: dṛś (class 1)

गगने (gagane) - in the sky, in the atmosphere

(noun)

Locative, masculine, singular of gagana

gagana - sky, firmament, atmosphere

सहकेशवम् (sahakeśavam) - with Keśava, accompanied by Keśava

(adjective)

Accusative, masculine, singular of sahakeśava

sahakeśava - accompanied by Keśava

Compound type : Bahuvrihi (saha+keśava)

• saha – with, together with
  indeclinable
• keśava – Keśava (an epithet of Vishnu/Krishna)
  proper noun (masculine)