महाभारतः mahābhārataḥ - book-3, chapter-50, verse-16

तयोरदृष्टकामोऽभूच्छृण्वतोः सततं गुणान् ।
अन्योन्यं प्रति कौन्तेय स व्यवर्धत हृच्छयः ॥१६॥

16. tayoradṛṣṭakāmo'bhūcchṛṇvatoḥ satataṁ guṇān ,
anyonyaṁ prati kaunteya sa vyavardhata hṛcchayaḥ.

16. tayoḥ adṛṣṭakāmaḥ abhūt śṛṇvatoḥ satatam guṇān
anyonyam prati kaunteya sa vyavardhata hṛcchayaḥ

16. O son of Kuntī (Kaunteya), as those two (Nala and Damayantī) constantly heard about each other's virtues, a passion (kāma) that they had not yet seen for themselves began to grow within them, intensifying towards each other.

Words meanings summery:

• तयोः (tayoḥ) - of Nala and Damayantī (of those two, belonging to those two)

• अदृष्टकामः (adṛṣṭakāmaḥ) - a passion (kāma) not yet seen or realized by them (unseen desire, unperceived love)

• अभूत् (abhūt) - arose (became, arose, was)

• शृण्वतोः (śṛṇvatoḥ) - as they (Nala and Damayantī) listened (of the listening ones, while listening)

• सततम् (satatam) - constantly (constantly, perpetually, always)

• गुणान् (guṇān) - virtues (qualities, virtues, merits)

• अन्योन्यम् (anyonyam) - each other (each other, mutually)

• प्रति (prati) - towards (towards, against, concerning)

• कौन्तेय (kaunteya) - O Arjuna (O son of Kuntī)

• स (sa) - that (passion/love) (that, he)

• व्यवर्धत (vyavardhata) - grew, intensified (grew, increased)

• हृच्छयः (hṛcchayaḥ) - passion, love (heart-born, love, desire)

Words meanings and morphology

तयोः (tayoḥ) - of Nala and Damayantī (of those two, belonging to those two)

(pronoun)

Genitive, dual of tad

tad - that, he, she, it

Note: Can be masculine, feminine, or neuter in dual genitive/locative.

अदृष्टकामः (adṛṣṭakāmaḥ) - a passion (kāma) not yet seen or realized by them (unseen desire, unperceived love)

(noun)

Nominative, masculine, singular of adṛṣṭakāma

adṛṣṭakāma - unseen desire, unperceived love

Compound noun.

Compound type : karmadhāraya (adṛṣṭa+kāma)

• adṛṣṭa – unseen, unperceived, unknown
  adjective
  Past Passive Participle
  From prefix 'a-' (negation) + √dṛś (to see).
  Prefix: a
  Root: dṛś (class 1)
• kāma – desire, wish, love, pleasure
  noun (masculine)
  Root: kam (class 1)

अभूत् (abhūt) - arose (became, arose, was)

(verb)

3rd person , singular, active, aorist (Luṅ) of bhū

Aorist

3rd person singular active aorist form of √bhū.

Root: bhū (class 1)

शृण्वतोः (śṛṇvatoḥ) - as they (Nala and Damayantī) listened (of the listening ones, while listening)

(adjective)

Genitive, dual of śṛṇvat

śṛṇvat - listening, hearing

Present Active Participle

Present active participle of √śru (to hear).

Root: śru (class 5)

सततम् (satatam) - constantly (constantly, perpetually, always)

(indeclinable)

गुणान् (guṇān) - virtues (qualities, virtues, merits)

(noun)

Accusative, masculine, plural of guṇa

guṇa - quality, virtue, excellence, attribute

Note: Object of 'śṛṇvatoḥ'.

अन्योन्यम् (anyonyam) - each other (each other, mutually)

(pronoun)

Accusative, neuter, singular of anyonya

anyonya - each other, mutual, reciprocal

Compound of 'anya' + 'anya'.

प्रति (prati) - towards (towards, against, concerning)

(indeclinable)

Preposition/prefix.

कौन्तेय (kaunteya) - O Arjuna (O son of Kuntī)

(proper noun)

Vocative, masculine, singular of kaunteya

kaunteya - son of Kuntī

Derivative from Kuntī, often refers to Arjuna.

स (sa) - that (passion/love) (that, he)

(pronoun)

Nominative, masculine, singular of tad

tad - that, he, she, it

व्यवर्धत (vyavardhata) - grew, intensified (grew, increased)

(verb)

3rd person , singular, middle, imperfect (Laṅ) of vṛdh

Imperfect

3rd person singular middle imperfect form of √vṛdh (to grow) with prefix vi-.

Prefix: vi

Root: vṛdh (class 1)

हृच्छयः (hṛcchayaḥ) - passion, love (heart-born, love, desire)

(noun)

Nominative, masculine, singular of hṛcchaya

hṛcchaya - heart-born, love, passion, Kāma (god of love)

Compound noun.

Compound type : tatpuruṣa (hṛd+śaya)

• hṛd – heart, mind
  noun (neuter)
• śaya – lying, sleeping, residing
  adjective
  Derived from root √śī (to lie, to sleep), with suffix -a.
  Root: śī (class 2)

Note: Subject of 'vyavardhata'.