योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-125, verse-44

अच्छिन्ना एकतद्भावा दृश्यन्ते तत्त्वदर्शिनः ।
शिरः कमलजस्योच्चैः सामगायनतत्परम् ॥ ४४ ॥

acchinnā ekatadbhāvā dṛśyante tattvadarśinaḥ ,
śiraḥ kamalajasyoccaiḥ sāmagāyanatatparam 44

44. acchinnāḥ ekatadbhāvāḥ dṛśyante tattvadarśinaḥ
| śiraḥ kamalajasya uccaiḥ sāmagāyanatatparam ||

44. tattvadarśinaḥ acchinnāḥ ekatadbhāvāḥ dṛśyante
kamalajasya śiraḥ uccaiḥ sāmagāyanatatparam (asti)

44. Those who perceive ultimate reality see the unbroken oneness [of existence]. [Consider] the head of the lotus-born (kamalaja) [Brahma], intensely devoted to chanting Sāma hymns aloud...

Words meanings summery:

• अच्छिन्नाः (acchinnāḥ) - undivided, unbroken, continuous

• एकतद्भावाः (ekatadbhāvāḥ) - referring to the state of oneness with ultimate reality (having the nature of oneness with that, whose state is one with that)

• दृश्यन्ते (dṛśyante) - are seen, appear

• तत्त्वदर्शिनः (tattvadarśinaḥ) - those who grasp the fundamental nature of existence (knowers of reality, those who perceive the truth)

• शिरः (śiraḥ) - head

• कमलजस्य (kamalajasya) - of Brahma, who is traditionally born from a lotus (of the lotus-born)

• उच्चैः (uccaiḥ) - loudly, high, aloft

• सामगायनतत्परम् (sāmagāyanatatparam) - intensely devoted to chanting Sāma hymns, intent on Sāma chanting

Words meanings and morphology

अच्छिन्नाः (acchinnāḥ) - undivided, unbroken, continuous

(adjective)

Nominative, masculine, plural of acchinna

acchinna - undivided, unbroken, continuous, uninterrupted

Past Passive Participle

Derived from root chid (to cut, break) with the negative prefix a- and kṛt suffix -ta.

Compound type : nañ-tatpuruṣa (a+chinna)

• a – not, non-, un-
  indeclinable
  Negative prefix.
• chinna – cut, broken, divided, severed
  adjective (masculine)
  Past Passive Participle
  From root chid (to cut, break).
  Root: chid (class 7)

एकतद्भावाः (ekatadbhāvāḥ) - referring to the state of oneness with ultimate reality (having the nature of oneness with that, whose state is one with that)

(adjective)

Nominative, masculine, plural of ekatadbhāva

ekatadbhāva - the state of being one with that, identity with that

Compound type : bahuvrīhi (eka+tadbhāva)

• eka – one, single, unique
  numeral (masculine)
• tadbhāva – the state of being that, identity with that
  noun (masculine)
  Root: bhū (class 1)

Note: Functions adjectivally, modifying 'tattvadarśinaḥ'.

दृश्यन्ते (dṛśyante) - are seen, appear

(verb)

3rd person , plural, passive, present indicative (laṭ) of dṛś

Present Indicative, Passive Voice

Root: dṛś (class 1)

तत्त्वदर्शिनः (tattvadarśinaḥ) - those who grasp the fundamental nature of existence (knowers of reality, those who perceive the truth)

(noun)

Nominative, masculine, plural of tattvadarśin

tattvadarśin - a seer of truth, one who perceives reality, philosopher

Compound type : tatpuruṣa (tattva+darśin)

• tattva – reality, truth, essence, principle, thatness
  noun (neuter)
• darśin – seeing, perceiving, a seer, one who sees
  noun (masculine)
  Agent noun from root dṛś (to see).
  Root: dṛś (class 1)

शिरः (śiraḥ) - head

(noun)

Nominative, neuter, singular of śiras

śiras - head, top, peak

कमलजस्य (kamalajasya) - of Brahma, who is traditionally born from a lotus (of the lotus-born)

(proper noun)

Genitive, masculine, singular of kamalaja

kamalaja - lotus-born, an epithet for Brahma

Compound type : upapada-tatpuruṣa (kamala+ja)

• kamala – lotus
  noun (neuter)
• ja – born, produced from
  suffix (masculine)
  Derived from root jan (to be born).
  Root: jan (class 4)

उच्चैः (uccaiḥ) - loudly, high, aloft

(indeclinable)

सामगायनतत्परम् (sāmagāyanatatparam) - intensely devoted to chanting Sāma hymns, intent on Sāma chanting

(adjective)

Nominative, neuter, singular of sāmagāyanatatpara

sāmagāyanatatpara - devoted to Sāma chanting, engrossed in Sāma singing

Compound type : tatpuruṣa (sāmagāyana+tatpara)

• sāmagāyana – chanting of Sāma, Sāma hymn chanting
  noun (neuter)
  From sāman (Sāma hymn) and gāyana (singing).
• tatpara – intent on that, devoted to that, absorbed in that
  adjective (masculine)

Note: Agrees with 'śiraḥ'.