योगवासिष्ठः yogavāsiṣṭhaḥ - book-2, chapter-16, verse-9

साधुसंगतयो लोके सन्मार्गस्य च दीपिकाः ।
हार्दान्धकारहारिण्यो भासो ज्ञानविवस्वतः ॥ ९ ॥

sādhusaṃgatayo loke sanmārgasya ca dīpikāḥ ,
hārdāndhakārahāriṇyo bhāso jñānavivasvataḥ 9

9. sādhusaṅgatayaḥ loke sanmārgasya ca dīpikāḥ
hārdāndhakārahāriṇyaḥ bhāsaḥ jñānavivasvataḥ

9. loke sādhusaṅgatayaḥ sanmārgasya dīpikāḥ ca
jñānavivasvataḥ bhāsaḥ hārdāndhakārahāriṇyaḥ

9. In this world, the company of virtuous people (sādhu-saṅgati) serves as a guiding light for the right path. They are like rays from the sun of knowledge, dispelling the darkness of the heart.

Words meanings summery:

• साधुसङ्गतयः (sādhusaṅgatayaḥ) - associations with virtuous people, company of good people

• लोके (loke) - in the world, among people

• सन्मार्गस्य (sanmārgasya) - of the right path, of the good way

• च (ca) - and

• दीपिकाः (dīpikāḥ) - lamps, illuminators, guiding lights

• हार्दान्धकारहारिण्यः (hārdāndhakārahāriṇyaḥ) - removers of the darkness of the heart

• भासः (bhāsaḥ) - rays, splendors, lights

• ज्ञानविवस्वतः (jñānavivasvataḥ) - of the sun of knowledge

Words meanings and morphology

साधुसङ्गतयः (sādhusaṅgatayaḥ) - associations with virtuous people, company of good people

(noun)

Nominative, feminine, plural of sādhusaṅgati

sādhusaṅgati - association with virtuous people, company of good people

Compound type : ṣaṣṭhī-tatpuruṣa (sādhu+saṅgati)

• sādhu – virtuous, good, wise person, saint
  noun (masculine)
• saṅgati – association, company, union
  noun (feminine)
  Prefix: sam
  Root: gam (class 1)

लोके (loke) - in the world, among people

(noun)

Locative, masculine, singular of loka

loka - world, realm, people

सन्मार्गस्य (sanmārgasya) - of the right path, of the good way

(noun)

Genitive, masculine, singular of sanmārga

sanmārga - right path, good way

Compound type : karmadhāraya (sat+mārga)

• sat – good, true, right, existing
  adjective (neuter)
  Present Active Participle
  Derived from root as (to be)
  Root: as (class 2)
• mārga – path, road, way
  noun (masculine)
  Root: mṛg (class 1)

च (ca) - and

(indeclinable)

दीपिकाः (dīpikāḥ) - lamps, illuminators, guiding lights

(noun)

Nominative, feminine, plural of dīpikā

dīpikā - lamp, light, illuminator

Root: dīp (class 4)

हार्दान्धकारहारिण्यः (hārdāndhakārahāriṇyaḥ) - removers of the darkness of the heart

(adjective)

Nominative, feminine, plural of hārdāndhakārahāriṇī

hārdāndhakārahāriṇī - remover of the darkness of the heart

Compound type : tatpuruṣa (hṛd+andhakāra+hāriṇī)

• hṛd – heart, mind
  noun (neuter)
• andhakāra – darkness, gloom
  noun (masculine)
• hāriṇī – removing, taking away, captivating
  adjective (feminine)
  Agent noun from root hṛ (to take, remove) + ṇinī suffix
  Root: hṛ (class 1)

भासः (bhāsaḥ) - rays, splendors, lights

(noun)

Nominative, feminine, plural of bhās

bhās - light, splendor, ray, appearance

Root: bhās (class 1)

ज्ञानविवस्वतः (jñānavivasvataḥ) - of the sun of knowledge

(noun)

Genitive, masculine, singular of jñānavivasvat

jñānavivasvat - sun of knowledge

Compound type : ṣaṣṭhī-tatpuruṣa (jñāna+vivasvat)

• jñāna – knowledge, wisdom
  noun (neuter)
  Root: jñā (class 9)
• vivasvat – sun, bright, shining
  noun (masculine)