महाभारतः mahābhārataḥ - book-13, chapter-107, verse-47

सम्यङ्मिथ्याप्रवृत्तेऽपि वर्तितव्यं गुराविह ।
गुरुनिन्दा दहत्यायुर्मनुष्याणां न संशयः ॥४७॥

47. samyaṅmithyāpravṛtte'pi vartitavyaṁ gurāviha ,
gurunindā dahatyāyurmanuṣyāṇāṁ na saṁśayaḥ.

47. samyak mithyā-pravṛtte api vartitavyam gurau iha
| guru-nindā dahati āyuḥ manuṣyāṇām na saṃśayaḥ

47. Even if a teacher (guru) behaves wrongly, one should still act properly towards him in this world. There is no doubt that criticism of a teacher (guru) diminishes the lifespan of human beings.

Words meanings summery:

• सम्यक् (samyak) - properly, correctly, truly, completely

• मिथ्या-प्रवृत्ते (mithyā-pravṛtte) - regarding a teacher who is behaving wrongly (in one who behaves wrongly, when behaving falsely)

• अपि (api) - even, also, though

• वर्तितव्यम् (vartitavyam) - one should behave, it should be acted

• गुरौ (gurau) - in a teacher, towards a teacher

• इह (iha) - here, in this world

• गुरु-निन्दा (guru-nindā) - criticism of a teacher

• दहति (dahati) - burns, consumes, destroys, diminishes

• आयुः (āyuḥ) - life, lifespan, duration of life

• मनुष्याणाम् (manuṣyāṇām) - of humans, of people

• न (na) - not

• संशयः (saṁśayaḥ) - doubt, uncertainty

Words meanings and morphology

सम्यक् (samyak) - properly, correctly, truly, completely

(indeclinable)

from sam (together, with) + añc (to bend, go)

Root: añc (class 1)

Note: Adverb.

मिथ्या-प्रवृत्ते (mithyā-pravṛtte) - regarding a teacher who is behaving wrongly (in one who behaves wrongly, when behaving falsely)

(adjective)

Locative, masculine, singular of mithyā-pravṛtta

mithyā-pravṛtta - one who has behaved wrongly, acting falsely

Past Passive Participle

Compound type : karmadhāraya (mithyā+pravṛtta)

• mithyā – falsely, wrongly, incorrectly
  indeclinable
• pravṛtta – engaged in, proceeding, behaved
  adjective (masculine)
  Past Passive Participle
  from pra + root vṛt (to be, to turn)
  Prefix: pra
  Root: vṛt (class 1)

Note: Modifies the implicit guru.

अपि (api) - even, also, though

(indeclinable)

वर्तितव्यम् (vartitavyam) - one should behave, it should be acted

(adjective)

Nominative, neuter, singular of vartitavya

vartitavya - to be behaved, to be acted

Gerundive

from root vṛt (to be, to turn) + tavya pratyaya

Root: vṛt (class 1)

Note: Impersonal construction, 'it should be behaved'.

गुरौ (gurau) - in a teacher, towards a teacher

(noun)

Locative, masculine, singular of guru

guru - teacher, preceptor, respected elder

इह (iha) - here, in this world

(indeclinable)

गुरु-निन्दा (guru-nindā) - criticism of a teacher

(noun)

Nominative, feminine, singular of guru-nindā

guru-nindā - criticism of a teacher, disrespect towards a guru

Compound type : tatpurusha (guru+nindā)

• guru – teacher, preceptor, respected elder
  noun (masculine)
• nindā – blame, censure, criticism, reproach
  noun (feminine)
  from root nind (to blame)
  Root: nind (class 1)

Note: Compound word.

दहति (dahati) - burns, consumes, destroys, diminishes

(verb)

3rd person , singular, active, present (laṭ) of dah

Root: dah (class 1)

आयुः (āyuḥ) - life, lifespan, duration of life

(noun)

Accusative, neuter, singular of āyus

āyus - life, lifespan, duration of life

मनुष्याणाम् (manuṣyāṇām) - of humans, of people

(noun)

Genitive, masculine, plural of manuṣya

manuṣya - human, man, person

न (na) - not

(indeclinable)

संशयः (saṁśayaḥ) - doubt, uncertainty

(noun)

Nominative, masculine, singular of saṃśaya

saṁśaya - doubt, uncertainty, hesitation

from sam + root śī (to lie, doubt)

Prefix: sam

Root: śī (class 2)