महाभारतः mahābhārataḥ - book-7, chapter-1, verse-21

अनादृत्य वचः पथ्यं गाङ्गेयस्य महात्मनः ।
निर्ययुर्भरतश्रेष्ठाः शस्त्राण्यादाय सर्वशः ॥२१॥

21. anādṛtya vacaḥ pathyaṁ gāṅgeyasya mahātmanaḥ ,
niryayurbharataśreṣṭhāḥ śastrāṇyādāya sarvaśaḥ.

21. anādṛtya vacaḥ pathyam gāṅgeyasya mahātmanaḥ
niryayuḥ bharataśreṣṭhāḥ śastrāṇi ādāya sarvaśaḥ

21. bharataśreṣṭhāḥ mahātmanaḥ gāṅgeyasya pathyam
vacaḥ anādṛtya śastrāṇi sarvaśaḥ ādāya niryayuḥ

21. Disregarding the beneficial words of the great-souled son of Gangā (Bhishma), the foremost among the Bharatas went forth, fully taking up their weapons.

Words meanings summery:

• अनादृत्य (anādṛtya) - disregarding (having disregarded, not heeding)

• वचः (vacaḥ) - the words (advice) (word, speech, saying)

• पथ्यम् (pathyam) - beneficial (words) (wholesome, beneficial, suitable)

• गाङ्गेयस्य (gāṅgeyasya) - of Gangeya (Bhishma) (of the son of Gangā, of Bhishma)

• महात्मनः (mahātmanaḥ) - of the great-souled one (Bhishma) (of the great-souled, of the noble)

• निर्ययुः (niryayuḥ) - they went forth, they departed

• भरतश्रेष्ठाः (bharataśreṣṭhāḥ) - the foremost among the Bharatas (referring to the Kauravas) (the best of Bharatas)

• शस्त्राणि (śastrāṇi) - weapons, instruments

• आदाय (ādāya) - taking up (having taken, taking, grasping)

• सर्वशः (sarvaśaḥ) - fully (entirely, completely, in every way)

Words meanings and morphology

अनादृत्य (anādṛtya) - disregarding (having disregarded, not heeding)

(indeclinable)

Absolutive

formed with upasargas an and ā from root dṛ

Prefixes: an+ā

Root: dṛ (class 6)

वचः (vacaḥ) - the words (advice) (word, speech, saying)

(noun)

Accusative, neuter, singular of vacas

vacas - word, speech, saying, declaration

पथ्यम् (pathyam) - beneficial (words) (wholesome, beneficial, suitable)

(adjective)

Accusative, neuter, singular of pathya

pathya - wholesome, salutary, beneficial, suitable for the path

गाङ्गेयस्य (gāṅgeyasya) - of Gangeya (Bhishma) (of the son of Gangā, of Bhishma)

(proper noun)

Genitive, masculine, singular of gāṅgeya

gāṅgeya - son of Gangā, Bhishma

महात्मनः (mahātmanaḥ) - of the great-souled one (Bhishma) (of the great-souled, of the noble)

(adjective)

Genitive, masculine, singular of mahātman

mahātman - great-souled, noble, magnanimous, possessing a great soul (ātman)

Compound type : bahuvrīhi (mahat+ātman)

• mahat – great, large, important, mighty
  adjective
• ātman – self, soul, spirit, individual (ātman)
  noun (masculine)

निर्ययुः (niryayuḥ) - they went forth, they departed

(verb)

3rd person , plural, active, Perfect (Lit) of niryā

root yā with upasarga nis

Prefix: nis

Root: yā (class 2)

भरतश्रेष्ठाः (bharataśreṣṭhāḥ) - the foremost among the Bharatas (referring to the Kauravas) (the best of Bharatas)

(proper noun)

Nominative, masculine, plural of bharataśreṣṭha

bharataśreṣṭha - best among the Bharatas, foremost of Bharatas

Compound type : tatpuruṣa (bharata+śreṣṭha)

• bharata – a descendant of Bharata, name of a king, a kingdom
  proper noun (masculine)
• śreṣṭha – best, excellent, superior, most excellent
  adjective

शस्त्राणि (śastrāṇi) - weapons, instruments

(noun)

Accusative, neuter, plural of śastra

śastra - weapon, instrument, sword

आदाय (ādāya) - taking up (having taken, taking, grasping)

(indeclinable)

Absolutive

formed with upasarga ā from root dā

Prefix: ā

Root: dā (class 3)

सर्वशः (sarvaśaḥ) - fully (entirely, completely, in every way)

(indeclinable)