योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-2, verse-13

कर्मबीजं तरोरस्य सुखदुःखफलावलेः ।
क्षणतारुण्यकान्तस्य जराकुसुमहासिनः ॥ १३ ॥

karmabījaṃ tarorasya sukhaduḥkhaphalāvaleḥ ,
kṣaṇatāruṇyakāntasya jarākusumahāsinaḥ 13

13. karma-bījam taroḥ asya sukha-duḥkha-phala-avaleḥ
kṣaṇa-tāruṇya-kāntasya jarā-kusuma-hāsinaḥ

13. asya taroḥ karma-bījam sukha-duḥkha-phala-avaleḥ
kṣaṇa-tāruṇya-kāntasya jarā-kusuma-hāsinaḥ

13. This tree, whose seed is action (karma), bears a multitude of fruits consisting of happiness and sorrow. It possesses the momentary charm of youth and smiles with the flowers of old age.

Words meanings summery:

• कर्म-बीजम् (karma-bījam) - the very essence or origin of actions (the seed of action, action's seed)

• तरोः (taroḥ) - of the tree

• अस्य (asya) - of this, of him, of it

• सुख-दुःख-फल-अवलेः (sukha-duḥkha-phala-avaleḥ) - describing the tree as having an abundance of results from actions (of a multitude of fruits of happiness and sorrow)

• क्षण-तारुण्य-कान्तस्य (kṣaṇa-tāruṇya-kāntasya) - describing the tree's ephemeral beauty of youth (of that which has the charm of momentary youth)

• जरा-कुसुम-हासिनः (jarā-kusuma-hāsinaḥ) - describing the tree's appearance in old age, likened to flowers blooming as a 'smile' (of that which smiles with the flowers of old age)

Words meanings and morphology

कर्म-बीजम् (karma-bījam) - the very essence or origin of actions (the seed of action, action's seed)

(noun)

Nominative, neuter, singular of karma-bīja

karma-bīja - the seed of action (karma)

Compound type : ṣaṣṭhī-tatpuruṣa (karma+bīja)

• karma – action, deed, ritual, fate
  noun (neuter)
• bīja – seed, origin, cause
  noun (neuter)

Note: Used in apposition to "this tree" (asya taroḥ).

तरोः (taroḥ) - of the tree

(noun)

Genitive, masculine, singular of taru

taru - tree

अस्य (asya) - of this, of him, of it

(pronoun)

Genitive, masculine, singular of idam

idam - this, he, she, it

सुख-दुःख-फल-अवलेः (sukha-duḥkha-phala-avaleḥ) - describing the tree as having an abundance of results from actions (of a multitude of fruits of happiness and sorrow)

(adjective)

Genitive, masculine, singular of sukha-duḥkha-phala-avali

sukha-duḥkha-phala-avali - having a multitude of fruits of happiness and sorrow

Compound type : bahuvrihi (sukha+duḥkha+phala+avali)

• sukha – happiness, joy, pleasure
  noun (neuter)
• duḥkha – sorrow, suffering, pain
  noun (neuter)
• phala – fruit, result, consequence
  noun (neuter)
• avali – row, series, multitude
  noun (feminine)

क्षण-तारुण्य-कान्तस्य (kṣaṇa-tāruṇya-kāntasya) - describing the tree's ephemeral beauty of youth (of that which has the charm of momentary youth)

(adjective)

Genitive, masculine, singular of kṣaṇa-tāruṇya-kānta

kṣaṇa-tāruṇya-kānta - possessing the charm of momentary youth

Compound type : bahuvrihi (kṣaṇa+tāruṇya+kānta)

• kṣaṇa – moment, instant, momentary
  noun/adjective (masculine)
• tāruṇya – youth, youthfulness
  noun (neuter)
• kānta – charming, lovely, beloved
  adjective (masculine)

जरा-कुसुम-हासिनः (jarā-kusuma-hāsinaḥ) - describing the tree's appearance in old age, likened to flowers blooming as a 'smile' (of that which smiles with the flowers of old age)

(adjective)

Genitive, masculine, singular of jarā-kusuma-hāsin

jarā-kusuma-hāsin - having the smile of old age's flowers, smiling with the flowers of old age

Compound type : bahuvrihi (jarā+kusuma+hāsin)

• jarā – old age, decrepitude
  noun (feminine)
• kusuma – flower, blossom
  noun (neuter)
• hāsin – smiling, laughing, shining
  adjective (masculine)
  Agent Noun / Adjective from root
  Derived from root √has (to laugh, smile) with suffix -in
  Root: has (class 1)