महाभारतः mahābhārataḥ - book-13, chapter-90, verse-27

अधीयते पुराणं ये धर्मशास्त्राण्यथापि च ।
अधीत्य च यथान्यायं विधिवत्तस्य कारिणः ॥२७॥

27. adhīyate purāṇaṁ ye dharmaśāstrāṇyathāpi ca ,
adhītya ca yathānyāyaṁ vidhivattasya kāriṇaḥ.

27. adhīyate purāṇam ye dharmaśāstrāṇi atha api ca
adhītya ca yathānyāyam vidhivat tasya kāriṇaḥ

27. ye purāṇam atha api ca dharmaśāstrāṇi adhīyate
ca yathānyāyam vidhivat adhītya tasya kāriṇaḥ

27. Those who study the Purāṇas and also the treatises on natural law (dharmaśāstra), and having properly studied them according to custom, become practitioners of those principles.

Words meanings summery:

• अधीयते (adhīyate) - they study (as an ongoing activity or characteristic) (they study, they learn)

• पुराणम् (purāṇam) - the Purāṇas (ancient mythological and historical texts) (ancient tale, Purāṇa (a class of sacred Hindu texts))

• ये (ye) - those who (who, those who)

• धर्मशास्त्राणि (dharmaśāstrāṇi) - the treatises on natural law (dharma) (treatises on (dharma), law books, codes of conduct)

• अथ (atha) - also (then, thus, also, moreover)

• अपि (api) - also (also, even, too)

• च (ca) - and (and, also)

• अधीत्य (adhītya) - having studied (them) (having studied, having learned)

• च (ca) - and (and, also)

• यथान्यायम् (yathānyāyam) - according to proper procedure/rule (according to justice, according to rule, properly)

• विधिवत् (vidhivat) - according to ritual injunctions / properly (according to rule, properly, ritually)

• तस्य (tasya) - of those (teachings) (of that, his, her, its)

• कारिणः (kāriṇaḥ) - practitioners (of those teachings) (doers, makers, practitioners)

Words meanings and morphology

अधीयते (adhīyate) - they study (as an ongoing activity or characteristic) (they study, they learn)

(verb)

3rd person , plural, middle, present indicative (laṭ) of adhī

Present Indicative

3rd person plural, middle voice (ātmanepada)

Prefix: adhi

Root: i (class 2)

Note: From root 'i' (to go) with prefix 'adhi' (upon, over, near).

पुराणम् (purāṇam) - the Purāṇas (ancient mythological and historical texts) (ancient tale, Purāṇa (a class of sacred Hindu texts))

(noun)

Accusative, neuter, singular of purāṇa

purāṇa - ancient, old; an ancient tale, myth, a Purāṇa (religious text)

Note: It's accusative singular, but contextually it refers to the class of texts, so 'Purāṇas' (plural) in English is appropriate.

ये (ye) - those who (who, those who)

(pronoun)

Nominative, masculine, plural of yad

yad - which, who, what

Note: Relative pronoun.

धर्मशास्त्राणि (dharmaśāstrāṇi) - the treatises on natural law (dharma) (treatises on (dharma), law books, codes of conduct)

(noun)

Accusative, neuter, plural of dharmaśāstra

dharmaśāstra - treatise on law and conduct, sacred law book

Compound type : tatpuruṣa (dharma+śāstra)

• dharma – natural law, constitution, duty, righteousness, virtue
  noun (masculine)
• śāstra – treatise, scripture, science, rule, instruction
  noun (neuter)

Note: Compound of 'dharma' and 'śāstra'.

अथ (atha) - also (then, thus, also, moreover)

(indeclinable)

Note: Used as an intensifier or conjunction.

अपि (api) - also (also, even, too)

(indeclinable)

Note: Conjunction.

च (ca) - and (and, also)

(indeclinable)

Note: Conjunction.

अधीत्य (adhītya) - having studied (them) (having studied, having learned)

(indeclinable)

absolutive

Derived from root 'i' with prefix 'adhi'.

Prefix: adhi

Root: i (class 2)

Note: Absolutive (gerund).

च (ca) - and (and, also)

(indeclinable)

Note: Conjunction.

यथान्यायम् (yathānyāyam) - according to proper procedure/rule (according to justice, according to rule, properly)

(indeclinable)

Compound type : avyayībhāva (yathā+nyāya)

• yathā – as, just as, according to
  indeclinable
• nyāya – rule, method, justice, logic
  noun (masculine)

Note: Avyayībhāva compound.

विधिवत् (vidhivat) - according to ritual injunctions / properly (according to rule, properly, ritually)

(indeclinable)

Derived from 'vidhi' with '-vat' suffix.

Note: Adverbial form.

तस्य (tasya) - of those (teachings) (of that, his, her, its)

(pronoun)

Genitive, neuter, singular of tad

tad - that, he, she, it

Note: Refers to the collective knowledge of Purāṇas and Dharmaśāstras. Grammatically singular, but contextually referring to plural teachings.

कारिणः (kāriṇaḥ) - practitioners (of those teachings) (doers, makers, practitioners)

(noun)

Nominative, masculine, plural of kārin

kārin - doer, maker, performer, practitioner

agent noun

Derived from root 'kṛ' (to do) with agentive suffix.

Root: kṛ (class 8)

Note: Nominative plural, referring back to 'ye' (those who).