महाभारतः mahābhārataḥ - book-8, chapter-27, verse-48

यावद्गाण्डीवनिर्घोषं न शृणोषि महाहवे ।
तावदेव त्वया कर्ण शक्यं वक्तुं यथेच्छसि ॥४८॥

48. yāvadgāṇḍīvanirghoṣaṁ na śṛṇoṣi mahāhave ,
tāvadeva tvayā karṇa śakyaṁ vaktuṁ yathecchasi.

48. yāvat gāṇḍīvanirghoṣam na śṛṇoṣi mahāhave tāvat
eva tvayā karṇa śakyam vaktum yathā icchasi

48. karṇa yāvat mahāhave gāṇḍīvanirghoṣam na śṛṇoṣi
tāvat eva tvayā yathā icchasi vaktum śakyam

48. Karna, as long as you do not hear the roar of the Gāṇḍīva bow in the great battle, only then can you speak whatever you wish.

Words meanings summery:

• यावत् (yāvat) - as long as, until

• गाण्डीवनिर्घोषम् (gāṇḍīvanirghoṣam) - roar/sound of the Gāṇḍīva bow

• न (na) - not

• शृणोषि (śṛṇoṣi) - you hear

• महाहवे (mahāhave) - in the great battle

• तावत् (tāvat) - so long, then, thus far

• एव (eva) - only, indeed, just

• त्वया (tvayā) - by you

• कर्ण (karṇa) - Karna

• शक्यम् (śakyam) - possible, capable

• वक्तुम् (vaktum) - to speak, to say

• यथा (yathā) - as, according to

• इच्छसि (icchasi) - you wish

Words meanings and morphology

यावत् (yāvat) - as long as, until

(indeclinable)

गाण्डीवनिर्घोषम् (gāṇḍīvanirghoṣam) - roar/sound of the Gāṇḍīva bow

(noun)

Accusative, masculine, singular of gāṇḍīvanirghoṣa

gāṇḍīvanirghoṣa - sound or roar of the Gāṇḍīva bow

Compound type : tatpuruṣa (gāṇḍīva+nirghoṣa)

• gāṇḍīva – Arjuna's bow
  proper noun (neuter)
• nirghoṣa – roar, sound, noise, echo
  noun (masculine)
  Prefix: nir

न (na) - not

(indeclinable)

शृणोषि (śṛṇoṣi) - you hear

(verb)

2nd person , singular, active, present indicative (laṭ) of śru

Root: śru (class 5)

महाहवे (mahāhave) - in the great battle

(noun)

Locative, masculine, singular of mahāhava

mahāhava - great battle, great war

Compound type : karmadhāraya (mahā+hava)

• mahat – great, large, mighty
  adjective
• hava – battle, fight, war, challenge
  noun (masculine)
  Root: hve (class 1)

तावत् (tāvat) - so long, then, thus far

(indeclinable)

एव (eva) - only, indeed, just

(indeclinable)

त्वया (tvayā) - by you

(pronoun)

Instrumental, singular of yusmad

yusmad - you

कर्ण (karṇa) - Karna

(proper noun)

Vocative, masculine, singular of karṇa

karṇa - Karna (son of Sūrya), ear

शक्यम् (śakyam) - possible, capable

(adjective)

Nominative, neuter, singular of śakya

śakya - possible, feasible, capable, able to be done

Gerundive

Derived from root śak, meaning 'able to be X-ed'.

Root: śak (class 5)

वक्तुम् (vaktum) - to speak, to say

(indeclinable)

Infinitive

Infinitive form of the root vac.

Root: vac (class 2)

यथा (yathā) - as, according to

(indeclinable)

इच्छसि (icchasi) - you wish

(verb)

2nd person , singular, active, present indicative (laṭ) of iṣ

Root: iṣ (class 6)