महाभारतः mahābhārataḥ - book-13, chapter-28, verse-18

मया त्वं यज्ञसंसिद्धौ नियुक्तो गुरुकर्मणि ।
कस्मात्प्रतिनिवृत्तोऽसि कच्चिन्न कुशलं तव ॥१८॥

18. mayā tvaṁ yajñasaṁsiddhau niyukto gurukarmaṇi ,
kasmātpratinivṛtto'si kaccinna kuśalaṁ tava.

18. mayā tvam yajñasaṃsiddhau niyuktaḥ gurukarmaṇi
kasmāt pratinivṛttaḥ asi kaccit na kuśalam tava

18. mayā tvam yajñasaṃsiddhau gurukarmaṇi niyuktaḥ (asi)
kasmāt pratinivṛttaḥ asi? tava kuśalam na kaccit

18. You were appointed by me to an important task for the successful completion of a Vedic ritual (yajña). Why have you returned? I hope all is well with you.

Words meanings summery:

• मया (mayā) - by me

• त्वम् (tvam) - you

• यज्ञसंसिद्धौ (yajñasaṁsiddhau) - in the successful completion of a Vedic ritual, for the success of a yajña

• नियुक्तः (niyuktaḥ) - appointed, engaged, assigned

• गुरुकर्मणि (gurukarmaṇi) - in an important task, in a teacher's duty

• कस्मात् (kasmāt) - why, from what (reason)

• प्रतिनिवृत्तः (pratinivṛttaḥ) - returned, come back

• असि (asi) - you are

• कच्चित् (kaccit) - I hope that (not), perhaps, perchance

• न (na) - not, no

• कुशलम् (kuśalam) - well-being, welfare, prosperity

• तव (tava) - your, of you

Words meanings and morphology

मया (mayā) - by me

(pronoun)

Instrumental, singular of asmad

asmad - I, me

त्वम् (tvam) - you

(pronoun)

Nominative, singular of yuṣmad

yuṣmad - you

यज्ञसंसिद्धौ (yajñasaṁsiddhau) - in the successful completion of a Vedic ritual, for the success of a yajña

(noun)

Locative, feminine, singular of yajñasaṃsiddhi

yajñasaṁsiddhi - successful completion of a yajña

Compound type : tatpurusha (yajña+saṃsiddhi)

• yajña – Vedic ritual, sacrifice, worship
  noun (masculine)
  Root: yaj (class 1)
• saṃsiddhi – perfection, accomplishment, complete success
  noun (feminine)
  Prefix: sam
  Root: sidh (class 4)

नियुक्तः (niyuktaḥ) - appointed, engaged, assigned

(adjective)

Nominative, masculine, singular of niyukta

niyukta - appointed, engaged, assigned, employed

Past Passive Participle

Derived from root yuj- with ni-prefix and -ta suffix

Prefix: ni

Root: yuj (class 7)

गुरुकर्मणि (gurukarmaṇi) - in an important task, in a teacher's duty

(noun)

Locative, neuter, singular of gurukarman

gurukarman - a great or important work/task; duty of a guru/teacher

Compound type : tatpurusha (guru+karman)

• guru – teacher, preceptor; heavy, important, weighty
  noun (masculine)
• karman – action, deed, work, duty, task
  noun (neuter)
  Root: kṛ (class 8)

कस्मात् (kasmāt) - why, from what (reason)

(pronoun)

Ablative, neuter, singular of kim

kim - who, what, which; why

प्रतिनिवृत्तः (pratinivṛttaḥ) - returned, come back

(adjective)

Nominative, masculine, singular of pratinivṛtta

pratinivṛtta - returned, come back, ceased

Past Passive Participle

Derived from root vṛt- with prati-ni- prefixes and -ta suffix

Prefixes: prati+ni

Root: vṛt (class 1)

असि (asi) - you are

(verb)

2nd person , singular, active, present (lat) of as

Root: as (class 2)

कच्चित् (kaccit) - I hope that (not), perhaps, perchance

(indeclinable)

न (na) - not, no

(indeclinable)

कुशलम् (kuśalam) - well-being, welfare, prosperity

(noun)

Nominative, neuter, singular of kuśala

kuśala - well-being, welfare, prosperity; skillful, clever

तव (tava) - your, of you

(pronoun)

Genitive, singular of yuṣmad

yuṣmad - you