योगवासिष्ठः yogavāsiṣṭhaḥ - book-4, chapter-5, verse-12

मन्दरोद्दामदोलासु बालो रमणलीलया ।
विद्याविद्यादृशोर्मध्ये शुक्रः प्राप्तमहापदः ॥ १२ ॥

mandaroddāmadolāsu bālo ramaṇalīlayā ,
vidyāvidyādṛśormadhye śukraḥ prāptamahāpadaḥ 12

12. mandara-uddāma-dolāsu bālaḥ ramaṇa-līlayā
vidyā-avidyā-dṛśoḥ madhye śukraḥ prāpta-mahā-padaḥ

12. bālaḥ śukraḥ mandara-uddāma-dolāsu ramaṇa-līlayā
vidyā-avidyā-dṛśoḥ madhye prāpta-mahā-padaḥ

12. The boy Śukra, engaging in playful activity on powerful swings resembling the Mandara mountain, attained a great state, poised between the perceptions of knowledge (vidyā) and ignorance (avidyā).

Words meanings summery:

• मन्दर-उद्दाम-दोलासु (mandara-uddāma-dolāsu) - on powerful swings resembling the Mandara mountain (on mighty swings like Mandara)

• बालः (bālaḥ) - the boy (boy, child, young, ignorant)

• रमण-लीलया (ramaṇa-līlayā) - through playful activity (by playful sport, with playful activity)

• विद्या-अविद्या-दृशोः (vidyā-avidyā-dṛśoḥ) - of the perceptions of knowledge (vidyā) and ignorance (avidyā) (of the two perceptions: knowledge and ignorance)

• मध्ये (madhye) - between (in the middle of, between)

• शुक्रः (śukraḥ) - Śukra (the character's name) (Śukra (name of a sage/deity), bright, pure, white)

• प्राप्त-महा-पदः (prāpta-mahā-padaḥ) - attained a great state (having attained a great state/position)

Words meanings and morphology

मन्दर-उद्दाम-दोलासु (mandara-uddāma-dolāsu) - on powerful swings resembling the Mandara mountain (on mighty swings like Mandara)

(noun)

Locative, feminine, plural of mandara-uddāma-dolā

mandara-uddāma-dolā - powerful swing (like Mandara mountain)

Compound type : karmadhāraya (mandara+uddāma+dolā)

• mandara – Mandara mountain (used in ocean churning); slow, firm
  proper noun (masculine)
• uddāma – unrestrained, mighty, powerful, boundless
  adjective (masculine)
• dolā – swing, oscillation
  noun (feminine)

Note: Indicates location of play.

बालः (bālaḥ) - the boy (boy, child, young, ignorant)

(noun)

Nominative, masculine, singular of bāla

bāla - child, boy, young, ignorant

Note: Subject.

रमण-लीलया (ramaṇa-līlayā) - through playful activity (by playful sport, with playful activity)

(noun)

Instrumental, feminine, singular of ramaṇa-līlā

ramaṇa-līlā - playful sport, amorous play, delightful activity

Compound type : tatpurusha (ramaṇa+līlā)

• ramaṇa – pleasing, delighting; sport, play, sexual intercourse
  noun (masculine)
  Derived from root `ram` (to delight, to sport).
  Root: ram (class 1)
• līlā – play, sport, amusement, divine sport
  noun (feminine)

Note: Indicates the means or manner of action.

विद्या-अविद्या-दृशोः (vidyā-avidyā-dṛśoḥ) - of the perceptions of knowledge (vidyā) and ignorance (avidyā) (of the two perceptions: knowledge and ignorance)

(noun)

Genitive, feminine, dual of vidyā-avidyā-dṛś

vidyā-avidyā-dṛś - perceptions of knowledge and ignorance

Compound type : dvandva (vidyā+avidyā+dṛś)

• vidyā – knowledge, learning, science, true knowledge
  noun (feminine)
• avidyā – ignorance, nescience, non-knowledge
  noun (feminine)
• dṛś – sight, view, perception, insight
  noun (feminine)
  Derived from root `dṛś` (to see).
  Root: dṛś (class 1)

Note: Dual genitive indicates "of the two".

मध्ये (madhye) - between (in the middle of, between)

(indeclinable)

Note: Prepositional use.

शुक्रः (śukraḥ) - Śukra (the character's name) (Śukra (name of a sage/deity), bright, pure, white)

(proper noun)

Nominative, masculine, singular of śukra

śukra - bright, pure, white; name of a divine sage (preceptor of asuras); the planet Venus

Note: Subject of the clause.

प्राप्त-महा-पदः (prāpta-mahā-padaḥ) - attained a great state (having attained a great state/position)

(adjective)

Nominative, masculine, singular of prāpta-mahā-pada

prāpta-mahā-pada - one who has attained a great state/position

Compound type : bahuvrihi (prāpta+mahā-pada)

• prāpta – attained, reached, obtained
  adjective (masculine)
  Past Passive Participle
  Derived from root `āp` with prefix `pra-`.
  Prefix: pra
  Root: āp (class 5)
• mahā-pada – great state, high position, important step
  noun (neuter)

Note: Adjective qualifying Śukra.