योगवासिष्ठः yogavāsiṣṭhaḥ - book-6, chapter-118, verse-13

तथाप्यद्याप्यपूर्णस्य यः पाता कालवारिधेः ।
तमात्मानं महागस्त्यं राजन्भावय सर्वदा ॥ १३ ॥

tathāpyadyāpyapūrṇasya yaḥ pātā kālavāridheḥ ,
tamātmānaṃ mahāgastyaṃ rājanbhāvaya sarvadā 13

13. tathā api adya api apūrṇasya yaḥ pātā kālavāridheḥ
tam ātmānam mahā-agastyam rājan bhāvaya sarvadā

13. rājan,
yaḥ adya api apūrṇasya kālavāridheḥ pātā,
tam mahā-agastyam ātmānam sarvadā bhāvaya tathā api

13. Yet, O King, always perceive that great Agastya, who is the drinker of the ever-unfilling ocean of time, as your own true self (ātman).

Words meanings summery:

• तथा (tathā) - yet, nevertheless (used in conjunction with 'api') (thus, so, in that manner)

• अपि (api) - yet, even (indicating concession) (also, even, too, still)

• अद्य (adya) - even now, still (used with 'api') (today, now, at present)

• अपि (api) - even (emphasizing 'now') (also, even, too, still)

• अपूर्णस्य (apūrṇasya) - of the ever-unfilling (referring to the ocean of time) (of the incomplete, of the not full)

• यः (yaḥ) - who (referring to Agastya) (who, which)

• पाता (pātā) - drinker (of the ocean, like Agastya) (drinker, protector)

• कालवारिधेः (kālavāridheḥ) - of the ocean of time

• तम् (tam) - him (referring to the great Agastya) (him, that)

• आत्मानम् (ātmānam) - true self (ātman) (self, soul, spirit)

• महा-अगस्त्यम् (mahā-agastyam) - the great Agastya

• राजन् (rājan) - O King (vocative address) (king, ruler)

• भावय (bhāvaya) - perceive, realize, contemplate (cause to be, reflect upon, contemplate)

• सर्वदा (sarvadā) - always, at all times

Words meanings and morphology

तथा (tathā) - yet, nevertheless (used in conjunction with 'api') (thus, so, in that manner)

(indeclinable)

अपि (api) - yet, even (indicating concession) (also, even, too, still)

(indeclinable)

अद्य (adya) - even now, still (used with 'api') (today, now, at present)

(indeclinable)

अपि (api) - even (emphasizing 'now') (also, even, too, still)

(indeclinable)

अपूर्णस्य (apūrṇasya) - of the ever-unfilling (referring to the ocean of time) (of the incomplete, of the not full)

(adjective)

Genitive, masculine, singular of apūrṇa

apūrṇa - incomplete, not full, unfilling

Compound type : nañ-tatpuruṣa (a+pūrṇa)

• a – not, un-, non-
  indeclinable
• pūrṇa – full, complete, filled
  adjective (masculine)
  Past Passive Participle
  Derived from root pṛ (to fill) with suffix kta
  Root: pṛ (class 9)

Note: Qualifies 'kālavāridheḥ'

यः (yaḥ) - who (referring to Agastya) (who, which)

(pronoun)

Nominative, masculine, singular of yad

yad - who, which, what, whatever

पाता (pātā) - drinker (of the ocean, like Agastya) (drinker, protector)

(noun)

Nominative, masculine, singular of pātṛ

pātṛ - drinker, protector, guardian, preserver

Agent noun

Derived from root pā (to drink/protect) with suffix tṛc

Root: pā (class 1)

कालवारिधेः (kālavāridheḥ) - of the ocean of time

(noun)

Genitive, masculine, singular of kālavāridhi

kālavāridhi - ocean of time

Compound type : ṣaṣṭhī-tatpuruṣa (kāla+vāridhi)

• kāla – time, black
  noun (masculine)
• vāridhi – ocean (holder of water)
  noun (masculine)

तम् (tam) - him (referring to the great Agastya) (him, that)

(pronoun)

Accusative, masculine, singular of tad

tad - that, him, her, it

आत्मानम् (ātmānam) - true self (ātman) (self, soul, spirit)

(noun)

Accusative, masculine, singular of ātman

ātman - self, soul, spirit, essence, mind, ego

महा-अगस्त्यम् (mahā-agastyam) - the great Agastya

(proper noun)

Accusative, masculine, singular of mahā-agastya

mahā-agastya - the great Agastya

Compound type : karmadhāraya (mahā+agastya)

• mahā – great, large, mighty
  adjective
• agastya – Agastya (name of a Vedic sage)
  proper noun (masculine)

राजन् (rājan) - O King (vocative address) (king, ruler)

(noun)

Vocative, masculine, singular of rājan

rājan - king, ruler

भावय (bhāvaya) - perceive, realize, contemplate (cause to be, reflect upon, contemplate)

(verb)

2nd person , singular, active, imperative (loṭ) of bhāvaya

Causative verb (P-P)

Derived from root bhū (to be) with causative suffix ṇic and verb ending

Root: bhū (class 1)

सर्वदा (sarvadā) - always, at all times

(indeclinable)

Derived from sarva (all) with the suffix dā (expressing time)