योगवासिष्ठः yogavāsiṣṭhaḥ - book-5, chapter-45, verse-18

जराजरठतां यातं स्वदेहसमपुत्रकम् ।
जीर्णंप्रायरसश्वभ्रतमालतरुसंनिभम् ॥ १८ ॥

jarājaraṭhatāṃ yātaṃ svadehasamaputrakam ,
jīrṇaṃprāyarasaśvabhratamālatarusaṃnibham 18

18. jarājaraṭhatām yātam svadehasamaputrakam
jīrṇaprāyaraśaśvabhratamālatarusaṃnibham

18. (saḥ) jarājaraṭhatām yātam svadehasamaputrakam
jīrṇaprāyaraśaśvabhratamālatarusaṃnibham (āśīt)

18. (He) who had attained decrepitude due to old age, whose son was like his own body (in decrepitude), and who resembled a Tamala tree that was almost withered, sapless, and with a hollowed-out trunk.

Words meanings summery:

• जराजरठताम् (jarājaraṭhatām) - to the state of decrepitude due to old age

• यातम् (yātam) - having attained (having gone, having attained, having reached)

• स्वदेहसमपुत्रकम् (svadehasamaputrakam) - whose son was similar to his own body (in decrepitude) (whose son was like his own body)

• जीर्णप्रायरशश्वभ्रतमालतरुसंनिभम् (jīrṇaprāyaraśaśvabhratamālatarusaṁnibham) - resembling a Tamala tree that was almost withered, sapless, and with a hollowed-out trunk (resembling a Tamala tree that is almost withered, sapless, and with a hollowed-out trunk)

Words meanings and morphology

जराजरठताम् (jarājaraṭhatām) - to the state of decrepitude due to old age

(noun)

Accusative, feminine, singular of jarājaraṭhatā

jarājaraṭhatā - decrepitude due to old age, extreme old age

Compound type : tatpuruṣa (jarā+jaraṭhatā)

• jarā – old age, decrepitude
  noun (feminine)
  Root: jṝ (class 9)
• jaraṭhatā – oldness, decrepitude, infirmity
  noun (feminine)
  Derived from jaraṭha (old, decrepit)

यातम् (yātam) - having attained (having gone, having attained, having reached)

(adjective)

Accusative, masculine, singular of yāta

yāta - gone, proceeded, attained

Past Passive Participle

Derived from root 'yā' (to go)

Root: yā (class 2)

Note: Modifies the implied 'him' (tam) from the previous verse.

स्वदेहसमपुत्रकम् (svadehasamaputrakam) - whose son was similar to his own body (in decrepitude) (whose son was like his own body)

(adjective)

Accusative, masculine, singular of svadehasamaputraka

svadehasamaputraka - one whose son is like one's own body

Compound type : bahuvrīhi (svadeha+sama+putraka)

• svadeha – one's own body
  noun (masculine)
• sama – equal, similar, like
  adjective (masculine)
• putraka – son (often diminutive or endearing)
  noun (masculine)

Note: Modifies the implied 'him' (tam).

जीर्णप्रायरशश्वभ्रतमालतरुसंनिभम् (jīrṇaprāyaraśaśvabhratamālatarusaṁnibham) - resembling a Tamala tree that was almost withered, sapless, and with a hollowed-out trunk (resembling a Tamala tree that is almost withered, sapless, and with a hollowed-out trunk)

(adjective)

Accusative, masculine, singular of jīrṇaprāyaraśaśvabhratamālatarusaṃnibha

jīrṇaprāyaraśaśvabhratamālatarusaṁnibha - resembling a Tamala tree that is almost withered, sapless/dried-up, and has a hollow (trunk)

Compound type : tatpuruṣa / bahuvrīhi (jīrṇaprāya+rasa+śvabhra+tamāla+taru+saṃnibha)

• jīrṇaprāya – almost withered, nearly decayed
  adjective (masculine)
  jīrṇa (withered, decayed) + prāya (almost)
• rasa – juice, sap, essence, taste, fluid
  noun (masculine)
• śvabhra – pit, hole, hollow, abyss
  noun (neuter)
• tamāla – Tamala tree (a tree with dark bark)
  noun (masculine)
• taru – tree
  noun (masculine)
• saṃnibha – resembling, similar to
  adjective (masculine)

Note: Modifies the implied 'him' (tam).