महाभारतः mahābhārataḥ - book-3, chapter-198, verse-74

त्रैविद्यवृद्धाः शुचयो वृत्तवन्तो मनस्विनः ।
गुरुशुश्रूषवो दान्ताः शिष्टाचारा भवन्त्युत ॥७४॥

74. traividyavṛddhāḥ śucayo vṛttavanto manasvinaḥ ,
guruśuśrūṣavo dāntāḥ śiṣṭācārā bhavantyuta.

74. traividyavṛddhāḥ śucayaḥ vṛttavantaḥ manasvinaḥ
guruśuśrūṣavaḥ dāntāḥ śiṣṭācārāḥ bhavanti uta

74. Those who are mature in the three Vedas, pure, possessing excellent conduct, strong-minded, devoted to serving their spiritual teacher (guru), and self-controlled, also become people of good conduct.

Words meanings summery:

• त्रैविद्यवृद्धाः (traividyavṛddhāḥ) - mature in the three Vedas, venerable due to knowledge of the three Vedas

• शुचयः (śucayaḥ) - pure, clean, virtuous

• वृत्तवन्तः (vṛttavantaḥ) - possessing good conduct, virtuous, well-behaved

• मनस्विनः (manasvinaḥ) - intelligent, high-minded, strong-minded, resolute

• गुरुशुश्रूषवः (guruśuśrūṣavaḥ) - devoted to serving their teacher, desirous of serving the guru

• दान्ताः (dāntāḥ) - self-controlled, subdued, disciplined

• शिष्टाचाराः (śiṣṭācārāḥ) - people of good conduct, well-behaved

• भवन्ति (bhavanti) - they become, they are

• उत (uta) - and, also, moreover

Words meanings and morphology

त्रैविद्यवृद्धाः (traividyavṛddhāḥ) - mature in the three Vedas, venerable due to knowledge of the three Vedas

(adjective)

Nominative, masculine, plural of traividyavṛddha

traividyavṛddha - advanced in the knowledge of the three Vedas

Compound type : tatpuruṣa (traividya+vṛddha)

• traividya – knowledge of the three Vedas
  noun (neuter)
  Derived from tri (three) and vidyā (knowledge)
• vṛddha – old, aged, mature, grown, advanced
  adjective (masculine)
  Past Passive Participle
  PPP of root vṛdh (to grow)
  Root: vṛdh (class 1)

शुचयः (śucayaḥ) - pure, clean, virtuous

(adjective)

Nominative, masculine, plural of śuci

śuci - pure, clean, holy, virtuous

वृत्तवन्तः (vṛttavantaḥ) - possessing good conduct, virtuous, well-behaved

(adjective)

Nominative, masculine, plural of vṛttavat

vṛttavat - endowed with conduct, virtuous, well-behaved

Possessive suffix mat/vat added to vṛtta.

मनस्विनः (manasvinaḥ) - intelligent, high-minded, strong-minded, resolute

(adjective)

Nominative, masculine, plural of manasvin

manasvin - intelligent, high-minded, wise, resolute, strong-willed

Possessive suffix vin added to manas.

गुरुशुश्रूषवः (guruśuśrūṣavaḥ) - devoted to serving their teacher, desirous of serving the guru

(adjective)

Nominative, masculine, plural of guruśuśrūṣu

guruśuśrūṣu - desirous of serving the teacher (guru), devoted to a guru

desiderative noun/adjective

From desiderative of root śru (to hear) with prefix śuśrū (to serve, to obey) + noun guru.

Compound type : tatpuruṣa (guru+śuśrūṣu)

• guru – teacher, spiritual preceptor, heavy, venerable
  noun (masculine)
• śuśrūṣu – desirous of hearing, desirous of serving, obedient
  adjective (masculine)
  desiderative noun/adjective
  Desiderative form of root śru (to hear)
  Root: śru (class 5)

दान्ताः (dāntāḥ) - self-controlled, subdued, disciplined

(adjective)

Nominative, masculine, plural of dānta

dānta - self-controlled, subdued, tamed, disciplined

Past Passive Participle

PPP of root dam (to tame, to control)

Root: dam (class 4)

शिष्टाचाराः (śiṣṭācārāḥ) - people of good conduct, well-behaved

(noun)

Nominative, masculine, plural of śiṣṭācāra

śiṣṭācāra - good conduct, custom of the cultured, well-behaved

Compound type : karmadhāraya (śiṣṭa+ācāra)

• śiṣṭa – disciplined, cultured, learned, well-behaved
  adjective (masculine)
  Past Passive Participle
  PPP of root śiṣ (to teach, to discipline)
  Root: śiṣ (class 7)
• ācāra – conduct, custom, practice, behavior
  noun (masculine)
  From root car (to move, to behave) with prefix ā
  Prefix: ā
  Root: car (class 1)

भवन्ति (bhavanti) - they become, they are

(verb)

3rd person , plural, active, present indicative (laṭ) of bhū

Present Indicative

3rd person plural present tense of root bhū

Root: bhū (class 1)

उत (uta) - and, also, moreover

(indeclinable)