महाभारतः mahābhārataḥ - book-3, chapter-148, verse-21

आत्मयोगसमायुक्तो धर्मोऽयं कृतलक्षणः ।
कृते युगे चतुष्पादश्चातुर्वर्ण्यस्य शाश्वतः ॥२१॥

21. ātmayogasamāyukto dharmo'yaṁ kṛtalakṣaṇaḥ ,
kṛte yuge catuṣpādaścāturvarṇyasya śāśvataḥ.

21. ātmayogasamāyuktaḥ dharmaḥ ayam kṛtalakṣaṇaḥ
kṛte yuge catuṣpādaḥ cāturvarṇyasya śāśvataḥ

21. This natural law (dharma), characterized by perfection and endowed with self-discipline (yoga), is four-footed and eternal for the four social classes (varṇa) in the Kṛta Yuga.

Words meanings summery:

• आत्मयोगसमायुक्तः (ātmayogasamāyuktaḥ) - endowed with self-discipline, fully connected with the self

• धर्मः (dharmaḥ) - righteousness, duty, law, constitution (dharma)

• अयम् (ayam) - this

• कृतलक्षणः (kṛtalakṣaṇaḥ) - Characterized by perfection or righteousness, implying completeness and purity. (characterized by merit, having definite characteristics, having perfect marks)

• कृते (kṛte) - Specifically refers to the Kṛta Yuga, the golden age. (in the Kṛta Yuga, in the completed (age))

• युगे (yuge) - in the age, in the epoch

• चतुष्पादः (catuṣpādaḥ) - Refers to dharma being complete and perfect in all its four aspects. (four-footed, having four parts/aspects)

• चातुर्वर्ण्यस्य (cāturvarṇyasya) - of the system of four social classes, of the four varṇas

• शाश्वतः (śāśvataḥ) - eternal, perpetual, everlasting

Words meanings and morphology

आत्मयोगसमायुक्तः (ātmayogasamāyuktaḥ) - endowed with self-discipline, fully connected with the self

(adjective)

Nominative, masculine, singular of ātmayogasamāyukta

ātmayogasamāyukta - well-connected with self-discipline (yoga of the self/ātman), endowed with the yoga of the ātman

compound of ātman, yoga, and samāyukta

Compound type : tatpurusha (ātman+yoga+samāyukta)

• ātman – self, soul, spirit, the individual soul (ātman)
  noun (masculine)
  Root: an (class 2)
• yoga – union, discipline, method, spiritual practice (yoga)
  noun (masculine)
  from root yuj
  Root: yuj (class 7)
• samāyukta – well-joined, endowed with, possessed of, connected
  adjective (masculine)
  Past Passive Participle
  From root yuj (to join) with upasargas sam and ā
  Prefixes: sam+ā
  Root: yuj (class 7)

Note: Qualifies dharmaḥ.

धर्मः (dharmaḥ) - righteousness, duty, law, constitution (dharma)

(noun)

Nominative, masculine, singular of dharma

dharma - righteousness, duty, law, moral order, intrinsic nature, constitution (dharma)

from root dhṛ (to uphold, sustain)

Root: dhṛ (class 1)

Note: Subject of the sentence.

अयम् (ayam) - this

(pronoun)

Nominative, masculine, singular of idam

idam - this, this one

Note: Qualifies dharmaḥ.

कृतलक्षणः (kṛtalakṣaṇaḥ) - Characterized by perfection or righteousness, implying completeness and purity. (characterized by merit, having definite characteristics, having perfect marks)

(adjective)

Nominative, masculine, singular of kṛtalakṣaṇa

kṛtalakṣaṇa - having its characteristics made, whose features are complete, perfect in its marks

Bahuvrīhi compound of kṛta and lakṣaṇa

Compound type : bahuvrīhi (kṛta+lakṣaṇa)

• kṛta – done, made, performed, complete, perfect
  adjective (masculine)
  Past Passive Participle
  From root kṛ (to do, make)
  Root: kṛ (class 8)
• lakṣaṇa – mark, sign, characteristic, definition
  noun (neuter)
  from root lakṣ (to mark, observe)
  Root: lakṣ (class 10)

Note: Qualifies dharmaḥ.

कृते (kṛte) - Specifically refers to the Kṛta Yuga, the golden age. (in the Kṛta Yuga, in the completed (age))

(noun)

Locative, neuter, singular of kṛta

kṛta - done, made, accomplished; also refers to the first of the four yugas (Kṛta Yuga)

Past Passive Participle

From root kṛ (to do, make)

Root: kṛ (class 8)

Note: Agrees with yuge.

युगे (yuge) - in the age, in the epoch

(noun)

Locative, neuter, singular of yuga

yuga - age, epoch, yoke, pair

Root: yuj (class 7)

चतुष्पादः (catuṣpādaḥ) - Refers to dharma being complete and perfect in all its four aspects. (four-footed, having four parts/aspects)

(adjective)

Nominative, masculine, singular of catuṣpāda

catuṣpāda - four-footed, having four parts or divisions

Bahuvrīhi compound of catur and pāda

Compound type : bahuvrīhi (catur+pāda)

• catur – four
  numeral
• pāda – foot, quarter, part, step
  noun (masculine)
  Root: pad (class 4)

Note: Qualifies dharmaḥ.

चातुर्वर्ण्यस्य (cāturvarṇyasya) - of the system of four social classes, of the four varṇas

(noun)

Genitive, neuter, singular of cāturvarṇya

cāturvarṇya - the system of four social classes (varṇa), the collection of four varṇas

derived from caturvarṇa (four varṇas)

Compound type : tatpurusha (catur+varṇa)

• catur – four
  numeral
• varṇa – color, social class, caste
  noun (masculine)
  from root vṛ (to cover, choose)
  Root: vṛ (class 9)

Note: Refers to the four social classes for whom this dharma is eternal.

शाश्वतः (śāśvataḥ) - eternal, perpetual, everlasting

(adjective)

Nominative, masculine, singular of śāśvata

śāśvata - eternal, perpetual, everlasting, constant

Note: Qualifies dharmaḥ.