महाभारतः mahābhārataḥ - book-12, chapter-234, verse-20

शुचिर्दक्षो गुणोपेतो ब्रूयादिषुरिवात्वरः ।
चक्षुषा गुरुमव्यग्रो निरीक्षेत जितेन्द्रियः ॥२०॥

20. śucirdakṣo guṇopeto brūyādiṣurivātvaraḥ ,
cakṣuṣā gurumavyagro nirīkṣeta jitendriyaḥ.

20. śuciḥ dakṣaḥ guṇopetaḥ brūyāt iṣuḥ iva atvaraḥ
cakṣuṣā gurum avyagraḥ nirīkṣeta jitendriyaḥ

20. śuciḥ dakṣaḥ guṇopetaḥ atvaraḥ iṣuḥ iva brūyāt
avyagraḥ jitendriyaḥ cakṣuṣā gurum nirīkṣeta

20. He should be pure, skillful, and endowed with virtues, speaking calmly and directly like an unhasty arrow. With self-control (jitendriya), he should observe his teacher (guru) with an unagitated gaze.

Words meanings summery:

• शुचिः (śuciḥ) - pure, clean, holy

• दक्षः (dakṣaḥ) - skillful, able, alert, expert

• गुणोपेतः (guṇopetaḥ) - endowed with qualities/virtues

• ब्रूयात् (brūyāt) - should speak, should say

• इषुः (iṣuḥ) - arrow

• इव (iva) - like, as, as if

• अत्वरः (atvaraḥ) - unhasty, unhurried, not quick

• चक्षुषा (cakṣuṣā) - with the eye

• गुरुम् (gurum) - to the teacher

• अव्यग्रः (avyagraḥ) - unagitated, calm, undistracted

• निरीक्षेत (nirīkṣeta) - should look at, should observe

• जितेन्द्रियः (jitendriyaḥ) - self-controlled, having conquered the senses

Words meanings and morphology

शुचिः (śuciḥ) - pure, clean, holy

(adjective)

Nominative, masculine, singular of śuci

śuci - clean, pure, holy, bright, white

Root: śuc (class 1)

दक्षः (dakṣaḥ) - skillful, able, alert, expert

(adjective)

Nominative, masculine, singular of dakṣa

dakṣa - able, skillful, clever, expert, ready, attentive

From root dakṣ (to be able).

Root: dakṣ (class 1)

गुणोपेतः (guṇopetaḥ) - endowed with qualities/virtues

(adjective)

Nominative, masculine, singular of guṇopeta

guṇopeta - endowed with good qualities, virtuous, accompanied by good qualities

Compound.

Compound type : tṛtīyā-tatpuruṣa (guṇa+upeta)

• guṇa – quality, virtue, excellence, constituent (of prakṛti)
  noun (masculine)
• upeta – approached, attained, endowed with, possessed of
  adjective (masculine)
  Past Passive Participle
  From upa-i (to go near) + kta suffix.
  Prefix: upa
  Root: i (class 2)

ब्रूयात् (brūyāt) - should speak, should say

(verb)

3rd person , singular, active, optative (vidhi-liṅ) of brū

Optative Mood

3rd person singular present optative active.

Root: brū (class 2)

इषुः (iṣuḥ) - arrow

(noun)

Nominative, masculine, singular of iṣu

iṣu - arrow, dart

इव (iva) - like, as, as if

(indeclinable)

Particle of comparison.

अत्वरः (atvaraḥ) - unhasty, unhurried, not quick

(adjective)

Nominative, masculine, singular of atvara

atvara - unhasty, deliberate, slow, not quick

Nañ-compound.

Compound type : nañ-tatpuruṣa (a+tvara)

• a – not, un-, in-
  indeclinable
  Negative prefix.
• tvara – quick, hasty, swift, hurrying
  adjective (masculine)
  From root tvar (to hasten).
  Root: tvar (class 1)

चक्षुषा (cakṣuṣā) - with the eye

(noun)

Instrumental, neuter, singular of cakṣus

cakṣus - eye, sight, vision, light

Root: cakṣ (class 2)

गुरुम् (gurum) - to the teacher

(noun)

Accusative, masculine, singular of guru

guru - teacher, preceptor, heavy, venerable (guru)

Root: gṛ (class 6)

अव्यग्रः (avyagraḥ) - unagitated, calm, undistracted

(adjective)

Nominative, masculine, singular of avyagra

avyagra - unagitated, calm, composed, undistracted, attentive

Nañ-compound.

Compound type : nañ-tatpuruṣa (a+vyagra)

• a – not, un-, in-
  indeclinable
  Negative prefix.
• vyagra – agitated, distracted, engrossed, eager
  adjective (masculine)
  From vi-agra (having the front disturbed).
  Prefix: vi
  Root: agra

निरीक्षेत (nirīkṣeta) - should look at, should observe

(verb)

3rd person , singular, middle, optative (vidhi-liṅ) of nirīkṣ

Optative Mood

3rd person singular present optative middle (ātmanepada).

Prefix: nis

Root: īkṣ (class 1)

जितेन्द्रियः (jitendriyaḥ) - self-controlled, having conquered the senses

(adjective)

Nominative, masculine, singular of jitendriya

jitendriya - having subdued the senses, self-controlled, ascetic

Bahuvrīhi compound.

Compound type : bahuvrīhi (jita+indriya)

• jita – conquered, subdued, vanquished
  adjective (masculine)
  Past Passive Participle
  From root ji (to conquer) + kta suffix.
  Root: ji (class 1)
• indriya – sense organ, faculty (of sense or action), power
  noun (neuter)
  Derived from indra (lord) related to power or faculties.