महाभारतः mahābhārataḥ - book-3, chapter-37, verse-16

अमर्षी नित्यसंहृष्टस्तत्र कर्णो महारथः ।
सर्वास्त्रविदनाधृष्य अभेद्यकवचावृतः ॥१६॥

16. amarṣī nityasaṁhṛṣṭastatra karṇo mahārathaḥ ,
sarvāstravidanādhṛṣya abhedyakavacāvṛtaḥ.

16. amarṣī nityasaṃhṛṣṭaḥ tatra karṇaḥ mahārathaḥ
sarvāstravit anādhṛṣyaḥ abhedyakavacāvṛtaḥ

16. Among them is Karna, the great charioteer, who is intolerant (of rivals) and always full of spirit. He is a knower of all weapons, irresistible, and covered by an impenetrable armor.

Words meanings summery:

• अमर्षी (amarṣī) - intolerant (of rivals or insults) (intolerant, impatient, unyielding, resentful)

• नित्यसंहृष्टः (nityasaṁhṛṣṭaḥ) - always full of spirit, constantly eager (for battle) (always delighted, constantly cheerful, always ready/eager)

• तत्र (tatra) - among them (the Kaurava warriors) (there, in that place, among them)

• कर्णः (karṇaḥ) - Karna (name of a warrior in the Mahabharata)

• महारथः (mahārathaḥ) - great charioteer (a warrior capable of fighting 10,000 archers simultaneously) (great charioteer, mighty warrior)

• सर्वास्त्रवित् (sarvāstravit) - knower of all weapons (knower of all weapons, expert in all arms)

• अनाधृष्यः (anādhṛṣyaḥ) - irresistible, unconquerable (irresistible, unconquerable, inviolable)

• अभेद्यकवचावृतः (abhedyakavacāvṛtaḥ) - covered by an impenetrable armor (referring to Karna's divine armor, Kavacha and Kundalas) (covered with impenetrable armor)

Words meanings and morphology

अमर्षी (amarṣī) - intolerant (of rivals or insults) (intolerant, impatient, unyielding, resentful)

(adjective)

Nominative, masculine, singular of amarṣin

amarṣin - intolerant, impatient, resentful, unyielding, fierce

From root mṛṣ 'to endure' with negative prefix 'a'.

Prefix: a

Root: mṛṣ (class 1)

Note: Refers to Karna.

नित्यसंहृष्टः (nityasaṁhṛṣṭaḥ) - always full of spirit, constantly eager (for battle) (always delighted, constantly cheerful, always ready/eager)

(adjective)

Nominative, masculine, singular of nityasaṃhṛṣṭa

nityasaṁhṛṣṭa - always delighted, constantly cheerful, ever joyful, always ready/eager

Compound type : karmadhāraya (nitya+saṃhṛṣṭa)

• nitya – constant, perpetual, eternal, always
  adjective
• saṃhṛṣṭa – delighted, pleased, exhilarated, ready, prepared
  adjective (masculine)
  Past Passive Participle
  From root hṛṣ 'to be excited/delighted' with prefix sam.
  Prefix: sam
  Root: hṛṣ (class 4)

Note: Refers to Karna.

तत्र (tatra) - among them (the Kaurava warriors) (there, in that place, among them)

(indeclinable)

कर्णः (karṇaḥ) - Karna (name of a warrior in the Mahabharata)

(proper noun)

Nominative, masculine, singular of karṇa

karṇa - Karna (a prominent warrior in the Mahabharata, son of Surya and Kunti)

महारथः (mahārathaḥ) - great charioteer (a warrior capable of fighting 10,000 archers simultaneously) (great charioteer, mighty warrior)

(noun)

Nominative, masculine, singular of mahāratha

mahāratha - great charioteer, mighty warrior, hero (a warrior capable of fighting 10,000 archers simultaneously)

Compound type : karmadhāraya (mahā+ratha)

• mahā – great, mighty, large
  indeclinable
• ratha – chariot, a warrior fighting from a chariot
  noun (masculine)

Note: Epithet for Karna.

सर्वास्त्रवित् (sarvāstravit) - knower of all weapons (knower of all weapons, expert in all arms)

(adjective)

Nominative, masculine, singular of sarvāstravid

sarvāstravid - knower of all weapons, expert in all arms

Compound of sarva (all), astra (weapon), and vid (knower).

Compound type : tatpuruṣa (sarva+astra+vid)

• sarva – all, every, whole
  pronoun (masculine)
• astra – missile, weapon
  noun (neuter)
• vid – knower, understanding
  noun (masculine)
  From root vid 'to know'.
  Root: vid (class 2)

Note: Epithet for Karna.

अनाधृष्यः (anādhṛṣyaḥ) - irresistible, unconquerable (irresistible, unconquerable, inviolable)

(adjective)

Nominative, masculine, singular of anādhṛṣya

anādhṛṣya - irresistible, unconquerable, inviolable, not to be assailed

Gerundive (negative)

From root dhṛṣ 'to be bold, dare' with negative prefix an.

Prefix: an

Root: dhṛṣ (class 5)

Note: Epithet for Karna.

अभेद्यकवचावृतः (abhedyakavacāvṛtaḥ) - covered by an impenetrable armor (referring to Karna's divine armor, Kavacha and Kundalas) (covered with impenetrable armor)

(adjective)

Nominative, masculine, singular of abhedyakavacāvṛta

abhedyakavacāvṛta - covered with an impenetrable armor

Compound describing Karna's armor.

Compound type : bahuvrīhi (abhedya+kavaca+āvṛta)

• abhedya – impenetrable, indivisible, not to be pierced or broken
  adjective (masculine)
  Gerundive (negative)
  From root bhid 'to break' with negative prefix a. Means 'not to be broken/pierced'.
  Prefix: a
  Root: bhid (class 7)
• kavaca – armor, breastplate
  noun (masculine)
• āvṛta – covered, surrounded, enveloped
  adjective (masculine)
  Past Passive Participle
  From root vṛ 'to cover' with prefix ā.
  Prefix: ā
  Root: vṛ (class 5)

Note: Epithet for Karna, referring to his divine armor.