महाभारतः mahābhārataḥ - book-3, chapter-252, verse-15

यदा किरीटी परवीरघाती निघ्नन्रथस्थो द्विषतां मनांसि ।
मदन्तरे त्वद्ध्वजिनीं प्रवेष्टा कक्षं दहन्नग्निरिवोष्णगेषु ॥१५॥

15. yadā kirīṭī paravīraghātī; nighnanrathastho dviṣatāṁ manāṁsi ,
madantare tvaddhvajinīṁ praveṣṭā; kakṣaṁ dahannagnirivoṣṇageṣu.

15. yadā kirīṭī paravīraghātī nighnan
rathasthaḥ dviṣatām manāṃsi mat
antare tvat dhvajinīm praveṣṭā
kakṣam dahan agniḥ iva uṣṇageṣu

15. When Arjuna (kirīṭī), the slayer of enemy heroes, standing on his chariot, destroys the morale of the adversaries, he will then enter your army in my presence, burning it like fire consumes dry grass in the hot season.

Words meanings summery:

• यदा (yadā) - when, at which time

• किरीटी (kirīṭī) - Arjuna, the Pandava hero (one wearing a diadem, Arjuna)

• परवीरघाती (paravīraghātī) - slayer of enemy heroes

• निघ्नन् (nighnan) - destroying (the morale/minds of enemies) (striking down, killing, destroying)

• रथस्थः (rathasthaḥ) - standing on a chariot

• द्विषताम् (dviṣatām) - of enemies, of adversaries

• मनांसि (manāṁsi) - morale (of the enemies) (minds, hearts, morale)

• मत् (mat) - my (referring to Draupadi) (my, by me)

• अन्तरे (antare) - in my presence, on my behalf (in the midst, between, during, in the interior)

• त्वत् (tvat) - your (referring to the king of Sauvīra) (your, from you)

• ध्वजिनीम् (dhvajinīm) - army

• प्रवेष्टा (praveṣṭā) - he will enter (will enter, one who enters)

• कक्षम् (kakṣam) - dry grass/undergrowth (dry grass, thicket, forest)

• दहन् (dahan) - burning, consuming

• अग्निः (agniḥ) - fire

• इव (iva) - like, as, as if

• उष्णगेषु (uṣṇageṣu) - in the hot season, in summer

Words meanings and morphology

यदा (yadā) - when, at which time

(indeclinable)

किरीटी (kirīṭī) - Arjuna, the Pandava hero (one wearing a diadem, Arjuna)

(proper noun)

Nominative, masculine, singular of kirīṭin

kirīṭin - wearing a diadem, crowned, Arjuna

Possessive suffix -in

परवीरघाती (paravīraghātī) - slayer of enemy heroes

(adjective)

Nominative, masculine, singular of paravīraghātin

paravīraghātin - slayer of hostile heroes

Agent noun with suffix -in

Compound type : tatpuruṣa (para+vīra+ghātin)

• para – other, hostile, enemy
  adjective (masculine)
• vīra – hero, brave man
  noun (masculine)
• ghātin – slayer, killer
  adjective (masculine)
  Agent noun derived from root han (to strike/kill)
  Root: han (class 2)

निघ्नन् (nighnan) - destroying (the morale/minds of enemies) (striking down, killing, destroying)

(adjective)

Nominative, masculine, singular of nighnat

nighnat - striking down, killing, destroying

Present Active Participle

From ni + han (to strike/kill) + śatṛ suffix

Prefix: ni

Root: han (class 2)

रथस्थः (rathasthaḥ) - standing on a chariot

(adjective)

Nominative, masculine, singular of rathastha

rathastha - standing or seated on a chariot

Derived from ratha (chariot) + sthā (to stand)

Compound type : tatpuruṣa (ratha+stha)

• ratha – chariot
  noun (masculine)
• stha – standing, situated
  adjective (masculine)
  Derived from root sthā (to stand)
  Root: sthā (class 1)

द्विषताम् (dviṣatām) - of enemies, of adversaries

(noun)

Genitive, masculine, plural of dviṣat

dviṣat - enemy, adversary

Present Active Participle

Derived from root dviṣ (to hate) + śatṛ suffix

Root: dviṣ (class 2)

मनांसि (manāṁsi) - morale (of the enemies) (minds, hearts, morale)

(noun)

Accusative, neuter, plural of manas

manas - mind, intellect, heart, morale

मत् (mat) - my (referring to Draupadi) (my, by me)

(pronoun)

Ablative, singular of asmad

asmad - I, myself

Note: Used in a compound or quasi-compound sense with 'antare' to mean 'in my presence/on my behalf'.

अन्तरे (antare) - in my presence, on my behalf (in the midst, between, during, in the interior)

(noun)

Locative, neuter, singular of antara

antara - interior, interval, midst, between, during

त्वत् (tvat) - your (referring to the king of Sauvīra) (your, from you)

(pronoun)

Ablative, singular of yuṣmad

yuṣmad - you, yourself

Note: Used in a compound sense with 'dhvajinīm' to mean 'your'.

ध्वजिनीम् (dhvajinīm) - army

(noun)

Accusative, feminine, singular of dhvajinī

dhvajinī - army, host (lit. 'having banners')

प्रवेष्टा (praveṣṭā) - he will enter (will enter, one who enters)

(adjective)

Nominative, masculine, singular of praveṣṭṛ

praveṣṭṛ - one who enters, entering

Agent noun (future active participle)

From pra + viś (to enter) + tṛc suffix; used here as future tense verb

Prefix: pra

Root: viś (class 6)

Note: Functions as a future tense verb.

कक्षम् (kakṣam) - dry grass/undergrowth (dry grass, thicket, forest)

(noun)

Accusative, masculine, singular of kakṣa

kakṣa - dry grass, thicket, forest, armpit

दहन् (dahan) - burning, consuming

(adjective)

Nominative, masculine, singular of dahat

dahat - burning, consuming

Present Active Participle

From root dah (to burn) + śatṛ suffix

Root: dah (class 1)

अग्निः (agniḥ) - fire

(noun)

Nominative, masculine, singular of agni

agni - fire, Agni (deity)

इव (iva) - like, as, as if

(indeclinable)

उष्णगेषु (uṣṇageṣu) - in the hot season, in summer

(noun)

Locative, masculine, plural of uṣṇaga

uṣṇaga - hot season, summer (lit. 'going in heat')

Compound type : tatpuruṣa (uṣṇa+ga)

• uṣṇa – hot, warm
  adjective (neuter)
• ga – going, moving, season
  noun (masculine)
  Derived from root gam (to go)
  Root: gam (class 1)

Note: Often refers to the summer season.