महाभारतः mahābhārataḥ - book-1, chapter-123, verse-37

तथैव हृष्टवदनस्तथैवादीनमानसः ।
छित्त्वाविचार्य तं प्रादाद्द्रोणायाङ्गुष्ठमात्मनः ॥३७॥

37. tathaiva hṛṣṭavadanastathaivādīnamānasaḥ ,
chittvāvicārya taṁ prādāddroṇāyāṅguṣṭhamātmanaḥ.

37. tathā eva hṛṣṭavadanaḥ tathā eva adīnamānasaḥ
chittvā avicārya tam prādāt droṇāya aṅguṣṭham ātmanaḥ

37. With a joyful face and an undaunted spirit, having cut it, he gave his own thumb (ātman) to Drona without a second thought.

Words meanings summery:

• तथा (tathā) - so, thus, in that manner

• एव (eva) - indeed, only, just, exactly

• हृष्टवदनः (hṛṣṭavadanaḥ) - with a joyful face, joyful-faced

• तथा (tathā) - so, thus, in that manner

• एव (eva) - indeed, only, just, exactly

• अदीनमानसः (adīnamānasaḥ) - with an undaunted spirit, resolute in mind

• छित्त्वा (chittvā) - having cut, after cutting

• अविचार्य (avicārya) - without considering, without hesitation

• तम् (tam) - that (thumb) (that, him, it)

• प्रादात् (prādāt) - he gave

• द्रोणाय (droṇāya) - to Drona

• अङ्गुष्ठम् (aṅguṣṭham) - thumb

• आत्मनः (ātmanaḥ) - of oneself, his own

Words meanings and morphology

तथा (tathā) - so, thus, in that manner

(indeclinable)

एव (eva) - indeed, only, just, exactly

(indeclinable)

हृष्टवदनः (hṛṣṭavadanaḥ) - with a joyful face, joyful-faced

(adjective)

Nominative, masculine, singular of hṛṣṭavadana

hṛṣṭavadana - joyful-faced, having a happy countenance

Compound type : bahuvrīhi (hṛṣṭa+vadana)

• hṛṣṭa – rejoiced, delighted, pleased, glad
  adjective (masculine)
  Past Passive Participle
  from root √hṛṣ (to be glad, to rejoice)
  Root: hṛṣ (class 4)
• vadana – face, mouth, countenance
  noun (neuter)
  Root: vad (class 1)

तथा (tathā) - so, thus, in that manner

(indeclinable)

एव (eva) - indeed, only, just, exactly

(indeclinable)

अदीनमानसः (adīnamānasaḥ) - with an undaunted spirit, resolute in mind

(adjective)

Nominative, masculine, singular of adīnamānasa

adīnamānasa - having an undaunted mind, resolute, brave

Compound type : bahuvrīhi (adīna+mānasa)

• adīna – not humble, not depressed, brave, undaunted
  adjective (masculine)
  negative prefix 'a' + 'dīna'
• mānasa – mind, intellect, heart, mental
  noun (neuter)
  from 'manas' (mind)
  Root: man (class 4)

छित्त्वा (chittvā) - having cut, after cutting

(indeclinable)

Absolutive (Gerund)

suffix -tvā to root √chid (to cut, cleave)

Root: chid (class 7)

अविचार्य (avicārya) - without considering, without hesitation

(indeclinable)

Absolutive (Gerund)

negative prefix 'a' + root √car with prefix 'vi' and suffix -ya

Compound type : nañ-tatpuruṣa (a+vicārya)

• a – not, un-
  prefix
  negative prefix
• vicārya – having considered, after deliberating
  indeclinable
  Absolutive (Gerund)
  from root √car with prefix vi and suffix -ya
  Prefix: vi
  Root: car (class 1)

तम् (tam) - that (thumb) (that, him, it)

(pronoun)

Accusative, masculine, singular of tad

tad - that, he, she, it

प्रादात् (prādāt) - he gave

(verb)

3rd person , singular, active, past (luṅ) of prādā

Root Aorist

root √dā with prefix pra

Prefix: pra

Root: dā (class 3)

द्रोणाय (droṇāya) - to Drona

(proper noun)

Dative, masculine, singular of droṇa

droṇa - Drona (name of a preceptor)

अङ्गुष्ठम् (aṅguṣṭham) - thumb

(noun)

Accusative, masculine, singular of aṅguṣṭha

aṅguṣṭha - thumb, big toe

आत्मनः (ātmanaḥ) - of oneself, his own

(noun)

Genitive, masculine, singular of ātman

ātman - self, soul, spirit, individual soul, essential nature