महाभारतः mahābhārataḥ - book-5, chapter-90, verse-13

अविजानत्सु मूढेषु निर्मर्यादेषु माधव ।
न त्वं वाक्यं ब्रुवन्युक्तश्चाण्डालेषु द्विजो यथा ॥१३॥

13. avijānatsu mūḍheṣu nirmaryādeṣu mādhava ,
na tvaṁ vākyaṁ bruvanyuktaścāṇḍāleṣu dvijo yathā.

13. avijānatsu mūḍheṣu nirmaryādeṣu mādhava | na
tvam vākyam bruvan yuktaḥ cāṇḍāleṣu dvijaḥ yathā

13. O Mādhava, it is not appropriate for you to speak among those who are ignorant, foolish, and without any sense of decorum, just as a twice-born (dvija) person should not speak among outcasts (cāṇḍālas).

Words meanings summery:

• अविजानत्सु (avijānatsu) - among those not knowing, among those not understanding, among the ignorant

• मूढेषु (mūḍheṣu) - among the foolish, among the deluded, among the bewildered

• निर्मर्यादेषु (nirmaryādeṣu) - among those without limits, without decorum, without moral bounds, lawless

• माधव (mādhava) - O Krishna (O Mādhava)

• न (na) - not, no

• त्वम् (tvam) - you

• वाक्यम् (vākyam) - word, speech, statement

• ब्रुवन् (bruvan) - speaking, saying, uttering

• युक्तः (yuktaḥ) - fit, appropriate, suitable, proper

• चाण्डालेषु (cāṇḍāleṣu) - among outcasts, among untouchables

• द्विजः (dvijaḥ) - a Brahmin (dvija) (twice-born (Brahmin, Kṣatriya, Vaiśya; also bird, tooth))

• यथा (yathā) - just as, like, as

Words meanings and morphology

अविजानत्सु (avijānatsu) - among those not knowing, among those not understanding, among the ignorant

(adjective)

Locative, masculine, plural of avijānat

avijānat - not knowing, ignorant, foolish, unaware

Present Active Participle

Derived from root jñā (to know) with prefix vi and negation a-, forming the present active participle.

Prefix: vi

Root: jñā (class 9)

Note: Present active participle, declined as an adjective.

मूढेषु (mūḍheṣu) - among the foolish, among the deluded, among the bewildered

(adjective)

Locative, masculine, plural of mūḍha

mūḍha - foolish, deluded, stupid, bewildered, confused

Past Passive Participle

From root muh (to be bewildered, confused).

Root: muh (class 4)

Note: Past passive participle, declined as an adjective.

निर्मर्यादेषु (nirmaryādeṣu) - among those without limits, without decorum, without moral bounds, lawless

(adjective)

Locative, masculine, plural of nirmaryāda

nirmaryāda - without boundaries, lawless, unprincipled, immoral, ill-behaved

Bahuvrīhi compound: nir (without) + maryādā (limit, boundary, decorum, moral law).

Compound type : bahuvrihi (nis+maryādā)

• nis – out, forth, without, free from
  indeclinable
  Prefix/preposition indicating negation, absence, or completion.
• maryādā – boundary, limit, moral law, decorum, rule, social conduct
  noun (feminine)

Note: Declined like 'deva'.

माधव (mādhava) - O Krishna (O Mādhava)

(proper noun)

Vocative, masculine, singular of mādhava

mādhava - Descendant of Madhu, sweet, lord of spring, a name of Krishna or Vishnu

न (na) - not, no

(indeclinable)

Negation particle.

त्वम् (tvam) - you

(pronoun)

Nominative, singular of yuṣmad

yuṣmad - you (singular)

Second person singular pronoun.

वाक्यम् (vākyam) - word, speech, statement

(noun)

Accusative, neuter, singular of vākya

vākya - word, speech, sentence, statement, utterance

From root vac (to speak).

Root: vac (class 2)

ब्रुवन् (bruvan) - speaking, saying, uttering

(adjective)

Nominative, masculine, singular of bruvat

bruvat - speaking, saying, uttering

Present Active Participle

From root brū (to speak, say).

Root: brū (class 2)

Note: Functions as an adjective modifying 'tvam'.

युक्तः (yuktaḥ) - fit, appropriate, suitable, proper

(adjective)

Nominative, masculine, singular of yukta

yukta - joined, united, endowed with, engaged in, fit, proper, appropriate, suitable

Past Passive Participle

From root yuj (to join, to yoke, to concentrate).

Root: yuj (class 7)

Note: Past passive participle, used adjectivally.

चाण्डालेषु (cāṇḍāleṣu) - among outcasts, among untouchables

(noun)

Locative, masculine, plural of cāṇḍāla

cāṇḍāla - an outcast, untouchable (traditionally, one born of a śūdra father and brahmin mother), a person of the lowest class

Note: Declined like 'deva'.

द्विजः (dvijaḥ) - a Brahmin (dvija) (twice-born (Brahmin, Kṣatriya, Vaiśya; also bird, tooth))

(noun)

Nominative, masculine, singular of dvija

dvija - twice-born (a Brahmin, Kṣatriya, or Vaiśya due to initiation; also bird due to hatching, tooth due to growing a second time, snake)

Tatpuruṣa compound: dvi (twice) + ja (born).

Compound type : tatpurusha (dvi+ja)

• dvi – two, twice
  numeral
• ja – born, produced from
  adjective (masculine/feminine/neuter)
  From root 'jan' (to be born).
  Root: jan (class 4)

यथा (yathā) - just as, like, as

(indeclinable)