महाभारतः mahābhārataḥ - book-1, chapter-142, verse-19

साहाय्येऽस्मि स्थितः पार्थ योधयिष्यामि राक्षसम् ।
नकुलः सहदेवश्च मातरं गोपयिष्यतः ॥१९॥

19. sāhāyye'smi sthitaḥ pārtha yodhayiṣyāmi rākṣasam ,
nakulaḥ sahadevaśca mātaraṁ gopayiṣyataḥ.

19. sāhāyye asmin sthitaḥ pārtha yodhayiṣyāmi rākṣasam
nakulaḥ sahadevaḥ ca mātaram gopayiṣyataḥ

19. Pārtha, I will stand here to provide help and fight the demon (rākṣasa). Nakula and Sahadeva will protect mother.

Words meanings summery:

• साहाय्ये (sāhāyye) - to provide help (in help, for assistance, in support)

• अस्मिन् (asmin) - in this (matter/place) (in this)

• स्थितः (sthitaḥ) - standing (by) (standing, situated, placed, being)

• पार्थ (pārtha) - O Arjuna (son of Pṛthā, Arjuna)

• योधयिष्यामि (yodhayiṣyāmi) - I will fight (I will cause to fight, I will fight)

• राक्षसम् (rākṣasam) - the demon (rākṣasa) (demon, evil being, guardian, protector)

• नकुलः (nakulaḥ) - Nakula (Nakula (one of the Pāṇḍavas), a mongoose)

• सहदेवः (sahadevaḥ) - Sahadeva (Sahadeva (one of the Pāṇḍavas), a divinity, a kind of plant)

• च (ca) - and (and, also, moreover)

• मातरम् (mātaram) - mother

• गोपयिष्यतः (gopayiṣyataḥ) - they two will protect

Words meanings and morphology

साहाय्ये (sāhāyye) - to provide help (in help, for assistance, in support)

(noun)

Locative, neuter, singular of sāhāyya

sāhāyya - help, assistance, support, aid

From sahāya (companion, helper) + -ya (abstract noun suffix)

अस्मिन् (asmin) - in this (matter/place) (in this)

(pronoun)

Locative, neuter, singular of idam

idam - this, this one, here

स्थितः (sthitaḥ) - standing (by) (standing, situated, placed, being)

(adjective)

Nominative, masculine, singular of sthita

sthita - stood, standing, situated, remaining, fixed, existing

Past Passive Participle

From root sthā (to stand) with -ta suffix

Root: sthā (class 1)

पार्थ (pārtha) - O Arjuna (son of Pṛthā, Arjuna)

(proper noun)

Vocative, masculine, singular of pārtha

pārtha - son of Pṛthā (a name for Arjuna, Yudhiṣṭhira, Bhīmasena, etc.), a kṣatriya, a king

Derived from Pṛthā (Kuntī)

योधयिष्यामि (yodhayiṣyāmi) - I will fight (I will cause to fight, I will fight)

(verb)

1st person , singular, active, future (lyṛṭ) of yudh

Future Causal

Causal stem yodhaya- + future suffix -iṣya + 1st person singular ending -āmi

Root: yudh (class 4)

राक्षसम् (rākṣasam) - the demon (rākṣasa) (demon, evil being, guardian, protector)

(noun)

Accusative, masculine, singular of rākṣasa

rākṣasa - a demon, an evil being, a fiend, a protector (less common)

From root rakṣ (to protect) + -as suffix

Root: rakṣ (class 1)

नकुलः (nakulaḥ) - Nakula (Nakula (one of the Pāṇḍavas), a mongoose)

(proper noun)

Nominative, masculine, singular of nakula

nakula - Nakula (one of the Pāṇḍavas), a mongoose, a kind of weapon

सहदेवः (sahadevaḥ) - Sahadeva (Sahadeva (one of the Pāṇḍavas), a divinity, a kind of plant)

(proper noun)

Nominative, masculine, singular of sahadeva

sahadeva - Sahadeva (one of the Pāṇḍavas), 'with the gods', a kind of plant

च (ca) - and (and, also, moreover)

(indeclinable)

मातरम् (mātaram) - mother

(noun)

Accusative, feminine, singular of mātṛ

mātṛ - mother

गोपयिष्यतः (gopayiṣyataḥ) - they two will protect

(verb)

3rd person , dual, active, future (lyṛṭ) of gup

Future Causal

Causal stem gopaya- + future suffix -iṣya + 3rd person dual ending -taḥ

Root: gup (class 1)