महाभारतः mahābhārataḥ - book-7, chapter-26, verse-14

तस्य बुद्ध्या विचार्यैतदर्जुनस्य कुरूद्वह ।
अभवद्भूयसी बुद्धिः संशप्तकवधे स्थिरा ॥१४॥

14. tasya buddhyā vicāryaitadarjunasya kurūdvaha ,
abhavadbhūyasī buddhiḥ saṁśaptakavadhe sthirā.

14. tasya buddhyā vicārya etat arjunasya kurūdvaha
abhavat bhūyasī buddhiḥ saṃśaptakavadhe sthirā

14. kurūdvaha tasya arjunasya buddhyā etat vicārya
buddhiḥ saṃśaptakavadhe bhūyasī sthirā abhavat

14. O upholder of the Kurus, having thoroughly considered this with his intellect, Arjuna's resolve became greatly firm in the slaying of the Saṃśaptakas.

Words meanings summery:

• तस्य (tasya) - of him, his

• बुद्ध्या (buddhyā) - by intellect, by understanding

• विचार्य (vicārya) - having considered, having thought over, having deliberated

• एतत् (etat) - this

• अर्जुनस्य (arjunasya) - of Arjuna

• कुरूद्वह (kurūdvaha) - O upholder of the Kurus, O best of the Kurus

• अभवत् (abhavat) - became, happened

• भूयसी (bhūyasī) - greatly, very much, more

• बुद्धिः (buddhiḥ) - intellect, understanding, resolve

• संशप्तकवधे (saṁśaptakavadhe) - in the slaying of the Saṃśaptakas

• स्थिरा (sthirā) - firm, steady

Words meanings and morphology

तस्य (tasya) - of him, his

(pronoun)

Genitive, masculine, singular of tad

tad - that, he/she/it

बुद्ध्या (buddhyā) - by intellect, by understanding

(noun)

Instrumental, feminine, singular of buddhi

buddhi - intellect, understanding, perception, resolve

derived from root budh (to know, perceive)

Root: budh (class 1)

विचार्य (vicārya) - having considered, having thought over, having deliberated

(indeclinable)

Absolutive (Gerund)

absolutive from root car (to move) with prefix vi-, often implying 'to investigate' or 'to ponder' when used with causal sense.

Prefix: vi

Root: car (class 1)

एतत् (etat) - this

(pronoun)

Accusative, neuter, singular of etad

etad - this

अर्जुनस्य (arjunasya) - of Arjuna

(proper noun)

Genitive, masculine, singular of arjuna

arjuna - Arjuna (a Pandava hero); white, clear

कुरूद्वह (kurūdvaha) - O upholder of the Kurus, O best of the Kurus

(noun)

Vocative, masculine, singular of kurūdvaha

kurūdvaha - best of the Kurus, upholder of the Kurus

Compound type : tatpuruṣa (kuru+udvaha)

• kuru – Kuru (name of an ancient king, ancestor of the Kauravas and Pandavas)
  proper noun (masculine)
• udvaha – bearing, carrying, leading, chief, prominent
  adjective/noun (masculine)
  from root vah (to carry) with prefix ud-
  Prefix: ud
  Root: vah (class 1)

अभवत् (abhavat) - became, happened

(verb)

3rd person , singular, active, past imperfect (laṅ) of bhū

Root: bhū (class 1)

भूयसी (bhūyasī) - greatly, very much, more

(adjective)

Nominative, feminine, singular of bhūyas

bhūyas - abundant, much, more, greater

comparative degree of bahu (much)

बुद्धिः (buddhiḥ) - intellect, understanding, resolve

(noun)

Nominative, feminine, singular of buddhi

buddhi - intellect, understanding, perception, resolve

derived from root budh (to know, perceive)

Root: budh (class 1)

संशप्तकवधे (saṁśaptakavadhe) - in the slaying of the Saṃśaptakas

(noun)

Locative, masculine, singular of saṃśaptakavadha

saṁśaptakavadha - slaying of the Saṃśaptakas

Compound type : tatpuruṣa (saṃśaptaka+vadha)

• saṃśaptaka – an oath-bound warrior (literally, 'one who has sworn together')
  noun (masculine)
  from sam-śap (to swear together)
  Prefix: sam
  Root: śap (class 1)
• vadha – slaying, killing
  noun (masculine)
  derived from root vadh (to strike, kill)
  Root: vadh (class 1)

स्थिरा (sthirā) - firm, steady

(adjective)

Nominative, feminine, singular of sthira

sthira - firm, steady, constant, immovable

derived from root sthā (to stand)

Root: sthā (class 1)