महाभारतः mahābhārataḥ - book-3, chapter-115, verse-18

धर्मेण लब्ध्वा तां भार्यामृचीको द्विजसत्तमः ।
यथाकामं यथाजोषं तया रेमे सुमध्यया ॥१८॥

18. dharmeṇa labdhvā tāṁ bhāryāmṛcīko dvijasattamaḥ ,
yathākāmaṁ yathājoṣaṁ tayā reme sumadhyayā.

18. dharmeṇa labdhvā tām bhāryām ṛcīkaḥ dvijasattamaḥ
yathākāmam yathājoṣam tayā reme sumadhyayā

18. The best among the Brahmins, Ṛcīka, having obtained that wife according to natural law (dharma), enjoyed with her, the slender-waisted one, to his heart's content and pleasure.

Words meanings summery:

• धर्मेण (dharmeṇa) - according to natural law (dharma) (by means of righteousness, according to one's intrinsic nature, by law)

• लब्ध्वा (labdhvā) - having obtained (having obtained, having gained)

• ताम् (tām) - that (wife) (her, that (feminine accusative singular))

• भार्याम् (bhāryām) - wife (wife, she who is to be supported)

• ऋचीकः (ṛcīkaḥ) - the sage Ṛcīka (Ṛcīka (name of a sage))

• द्विजसत्तमः (dvijasattamaḥ) - Ṛcīka, as the best among the Brahmins (best among the twice-born, excellent Brahmin)

• यथाकामम् (yathākāmam) - according to his desire (according to desire, as desired)

• यथाजोषम् (yathājoṣam) - according to his pleasure (according to liking, as pleased)

• तया (tayā) - with her (wife) (with her, by her (feminine instrumental singular))

• रेमे (reme) - he enjoyed (he enjoyed, he sported)

• सुमध्यया (sumadhyayā) - with his slender-waisted wife (with the slender-waisted one, with the beautiful-waisted one)

Words meanings and morphology

धर्मेण (dharmeṇa) - according to natural law (dharma) (by means of righteousness, according to one's intrinsic nature, by law)

(noun)

Instrumental, masculine, singular of dharma

dharma - natural law, constitution, duty, intrinsic nature, virtue, righteousness, religion

Root: dhṛ (class 1)

लब्ध्वा (labdhvā) - having obtained (having obtained, having gained)

(indeclinable)

gerund

Absolutive from root labh- (to obtain) + -tvā suffix

Root: labh (class 1)

ताम् (tām) - that (wife) (her, that (feminine accusative singular))

(pronoun)

Accusative, feminine, singular of tad

tad - that

भार्याम् (bhāryām) - wife (wife, she who is to be supported)

(noun)

Accusative, feminine, singular of bhāryā

bhāryā - wife

gerundive

From root bhṛ (to bear, support) + -ya suffix, meaning 'to be supported'

Root: bhṛ (class 3)

ऋचीकः (ṛcīkaḥ) - the sage Ṛcīka (Ṛcīka (name of a sage))

(proper noun)

Nominative, masculine, singular of ṛcīka

ṛcīka - Ṛcīka (a proper name)

द्विजसत्तमः (dvijasattamaḥ) - Ṛcīka, as the best among the Brahmins (best among the twice-born, excellent Brahmin)

(noun)

Nominative, masculine, singular of dvijasattama

dvijasattama - best among the twice-born

Compound type : tatpuruṣa (dvija+sattama)

• dvija – twice-born, brahmin, bird, tooth
  noun (masculine)
  From dvi (two) + jan (to be born)
  Root: jan (class 4)
• sattama – best, most excellent
  adjective (masculine)
  Superlative of sat (good, existing)
  Root: as (class 2)

Note: Compound with Ṛcīka.

यथाकामम् (yathākāmam) - according to his desire (according to desire, as desired)

(indeclinable)

Avyayībhāva compound

Compound type : avyayībhāva (yathā+kāma)

• yathā – as, according to
  indeclinable
• kāma – desire, wish, love
  noun (masculine)
  From root kam (to desire)
  Root: kam (class 1)

Note: Adverbial.

यथाजोषम् (yathājoṣam) - according to his pleasure (according to liking, as pleased)

(indeclinable)

Avyayībhāva compound

Compound type : avyayībhāva (yathā+joṣa)

• yathā – as, according to
  indeclinable
• joṣa – pleasure, liking, satisfaction
  noun (masculine)
  From root juṣ (to be pleased)
  Root: juṣ (class 1)

Note: Adverbial.

तया (tayā) - with her (wife) (with her, by her (feminine instrumental singular))

(pronoun)

Instrumental, feminine, singular of tad

tad - that

रेमे (reme) - he enjoyed (he enjoyed, he sported)

(verb)

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

Root: ram (class 1)

Note: Verb 'to enjoy, to sport'

सुमध्यया (sumadhyayā) - with his slender-waisted wife (with the slender-waisted one, with the beautiful-waisted one)

(adjective)

Instrumental, feminine, singular of sumadhyā

sumadhyā - slender-waisted

Bahuvrīhi compound, 'beautiful middle'

Compound type : bahuvrīhi (su+madhyā)

• su – good, beautiful, well
  indeclinable
  Prefix/adverb
• madhyā – middle, waist
  noun (feminine)
  From madhya (middle), feminine form

Note: Qualifies 'tayā'.