महाभारतः mahābhārataḥ - book-1, chapter-213, verse-66

विज्ञानेष्वपि चास्त्राणां सौष्ठवे च महाबलः ।
क्रियास्वपि च सर्वासु विशेषानभ्यशिक्षयत् ॥६६॥

66. vijñāneṣvapi cāstrāṇāṁ sauṣṭhave ca mahābalaḥ ,
kriyāsvapi ca sarvāsu viśeṣānabhyaśikṣayat.

66. vijñāneṣu api ca astrāṇām sauṣṭhave ca mahābalaḥ
kriyāsu api ca sarvāsu viśeṣān abhyaśikṣayat

66. The mighty one (mahābalaḥ) also taught him special techniques (viśeṣān) in the sciences (vijñāneṣu) of weapons (astrāṇām), in their skillful application (sauṣṭhave), and in all (sarvāsu) actions (kriyāsu) related to them.

Words meanings summery:

• विज्ञानेषु (vijñāneṣu) - in the sciences, in the specific knowledge

• अपि (api) - even, also, too

• च (ca) - and

• अस्त्राणाम् (astrāṇām) - of weapons, of missiles

• सौष्ठवे (sauṣṭhave) - in skill, in proficiency, in excellence

• च (ca) - and

• महाबलः (mahābalaḥ) - Arjuna, who is mighty (of great strength, mighty, powerful)

• क्रियासु (kriyāsu) - in the practical application or performance (of weapons) (in actions, in performances)

• अपि (api) - even, also, too

• च (ca) - and

• सर्वासु (sarvāsu) - in all, in every

• विशेषान् (viśeṣān) - special techniques or applications (specialities, particularities, distinctions)

• अभ्यशिक्षयत् (abhyaśikṣayat) - he thoroughly trained (him) (he taught, he trained)

Words meanings and morphology

विज्ञानेषु (vijñāneṣu) - in the sciences, in the specific knowledge

(noun)

Locative, neuter, plural of vijñāna

vijñāna - science, specific knowledge, understanding

Prefix: vi

Root: jñā (class 9)

अपि (api) - even, also, too

(indeclinable)

च (ca) - and

(indeclinable)

अस्त्राणाम् (astrāṇām) - of weapons, of missiles

(noun)

Genitive, neuter, plural of astra

astra - weapon, missile, dart

सौष्ठवे (sauṣṭhave) - in skill, in proficiency, in excellence

(noun)

Locative, neuter, singular of sauṣṭhava

sauṣṭhava - skill, dexterity, elegance, excellence, proficiency

derived from suṣṭhu (well, good)

च (ca) - and

(indeclinable)

महाबलः (mahābalaḥ) - Arjuna, who is mighty (of great strength, mighty, powerful)

(adjective)

Nominative, masculine, singular of mahābala

mahābala - of great strength, mighty, very powerful

Compound type : bahuvrīhi (mahat+bala)

• mahat – great, large, mighty
  adjective
• bala – strength, power, force
  noun (neuter)

क्रियासु (kriyāsu) - in the practical application or performance (of weapons) (in actions, in performances)

(noun)

Locative, feminine, plural of kriyā

kriyā - action, act, performance, ritual

verbal noun from root kṛ (to do)

Root: kṛ (class 8)

अपि (api) - even, also, too

(indeclinable)

च (ca) - and

(indeclinable)

सर्वासु (sarvāsu) - in all, in every

(pronoun)

Locative, feminine, plural of sarva

sarva - all, every, whole, entire

विशेषान् (viśeṣān) - special techniques or applications (specialities, particularities, distinctions)

(noun)

Accusative, masculine, plural of viśeṣa

viśeṣa - distinction, difference, peculiarity, speciality

अभ्यशिक्षयत् (abhyaśikṣayat) - he thoroughly trained (him) (he taught, he trained)

(verb)

3rd person , singular, active, imperfect (laṅ) of śikṣ

Prefix: abhi

Root: śikṣ (class 1)