महाभारतः mahābhārataḥ - book-1, chapter-94, verse-26

जातमात्रं पुरा दृष्टं तं पुत्रं शंतनुस्तदा ।
नोपलेभे स्मृतिं धीमानभिज्ञातुं तमात्मजम् ॥२६॥

26. jātamātraṁ purā dṛṣṭaṁ taṁ putraṁ śaṁtanustadā ,
nopalebhe smṛtiṁ dhīmānabhijñātuṁ tamātmajam.

26. jātamātram purā dṛṣṭam tam putram śaṃtanuḥ tadā
na upalebe smṛtim dhīmān abhijñātum tam ātmajam

26. Though he had seen that son previously, when he was just born, the wise Shantanu at that time could not regain the memory to recognize his own son.

Words meanings summery:

• जातमात्रम् (jātamātram) - merely born, as soon as born, just born

• पुरा (purā) - formerly, previously, in ancient times

• दृष्टम् (dṛṣṭam) - seen, observed

• तम् (tam) - him, that (masculine)

• पुत्रम् (putram) - son

• शंतनुः (śaṁtanuḥ) - King Shantanu (Shantanu (a king's name))

• तदा (tadā) - then, at that time

• न (na) - not, no

• उपलेबे (upalebe) - he attained, he regained, he perceived, he recognized

• स्मृतिम् (smṛtim) - memory, recollection

• धीमान् (dhīmān) - the wise Shantanu (intelligent, wise, sagacious)

• अभिज्ञातुम् (abhijñātum) - to recognize, to know, to perceive

• तम् (tam) - him, that (masculine)

• आत्मजम् (ātmajam) - son (born of oneself), own son

Words meanings and morphology

जातमात्रम् (jātamātram) - merely born, as soon as born, just born

(adjective)

Accusative, masculine, singular of jātamātra

jātamātra - merely born, just born, born only

Compound type : karmadhāraya (jāta+mātra)

• jāta – born, produced, arisen
  adjective
  Past Passive Participle
  From root `jan` (to be born)
  Root: jan (class 4)
• mātra – mere, only, as much as, pertaining to
  adjective

पुरा (purā) - formerly, previously, in ancient times

(indeclinable)

दृष्टम् (dṛṣṭam) - seen, observed

(adjective)

Accusative, masculine, singular of dṛṣṭa

dṛṣṭa - seen, observed, perceived

Past Passive Participle

From root `dṛś` (to see).

Root: dṛś (class 1)

तम् (tam) - him, that (masculine)

(pronoun)

Accusative, masculine, singular of tad

tad - that, he, it

पुत्रम् (putram) - son

(noun)

Accusative, masculine, singular of putra

putra - son, child

शंतनुः (śaṁtanuḥ) - King Shantanu (Shantanu (a king's name))

(proper noun)

Nominative, masculine, singular of śaṃtanu

śaṁtanu - Shantanu (name of a king, father of Bhishma)

तदा (tadā) - then, at that time

(indeclinable)

न (na) - not, no

(indeclinable)

उपलेबे (upalebe) - he attained, he regained, he perceived, he recognized

(verb)

3rd person , singular, middle, perfect (liṭ) of labh

Prefix: upa

Root: labh (class 1)

स्मृतिम् (smṛtim) - memory, recollection

(noun)

Accusative, feminine, singular of smṛti

smṛti - memory, recollection, tradition

धीमान् (dhīmān) - the wise Shantanu (intelligent, wise, sagacious)

(adjective)

Nominative, masculine, singular of dhīmat

dhīmat - intelligent, wise, sagacious, thoughtful

अभिज्ञातुम् (abhijñātum) - to recognize, to know, to perceive

(indeclinable)

Infinitive

From root `jñā` (to know) with prefix `abhi-`.

Prefix: abhi

Root: jñā (class 9)

तम् (tam) - him, that (masculine)

(pronoun)

Accusative, masculine, singular of tad

tad - that, he, it

आत्मजम् (ātmajam) - son (born of oneself), own son

(noun)

Accusative, masculine, singular of ātmaja

ātmaja - son (born of oneself), daughter, Kama (god of love)

Compound type : tatpuruṣa (ātman+ja)

• ātman – self, soul, spirit, essence
  noun (masculine)
• ja – born, produced from, originating from
  adjective
  Suffix -ja derived from root `jan` (to be born)
  Root: jan (class 4)