महाभारतः mahābhārataḥ - book-1, chapter-124, verse-12

तस्मिंस्ततोऽहनि प्राप्ते राजा ससचिवस्तदा ।
भीष्मं प्रमुखतः कृत्वा कृपं चाचार्यसत्तमम् ॥१२॥

12. tasmiṁstato'hani prāpte rājā sasacivastadā ,
bhīṣmaṁ pramukhataḥ kṛtvā kṛpaṁ cācāryasattamam.

12. tasmin tataḥ ahani prāpte rājā sasacivaḥ tadā
bhīṣmam pramukhataḥ kṛtvā kṛpam ca ācāryasattamam

12. Then, when that appointed day arrived, the king, accompanied by his ministers, and placing Bhishma and Kripa, the most excellent of preceptors, at the very front (or: in charge),...

Words meanings summery:

• तस्मिन् (tasmin) - on that

• ततः (tataḥ) - then, from there

• अहनि (ahani) - on the day

• प्राप्ते (prāpte) - having arrived, when arrived

• राजा (rājā) - the king

• ससचिवः (sasacivaḥ) - with his ministers, accompanied by ministers

• तदा (tadā) - then, at that time

• भीष्मम् (bhīṣmam) - Bhishma (accusative)

• प्रमुखतः (pramukhataḥ) - in front, at the head, principally

• कृत्वा (kṛtvā) - having made, having placed, having done

• कृपम् (kṛpam) - Kripa (accusative)

• च (ca) - and

• आचार्यसत्तमम् (ācāryasattamam) - the best of teachers, foremost preceptor

Words meanings and morphology

तस्मिन् (tasmin) - on that

(pronoun)

Locative, masculine, singular of tad

tad - that, he, it

Note: Agrees with ahani.

ततः (tataḥ) - then, from there

(indeclinable)

अहनि (ahani) - on the day

(noun)

Locative, neuter, singular of ahan

ahan - day

प्राप्ते (prāpte) - having arrived, when arrived

(adjective)

Locative, neuter, singular of prāpta

prāpta - arrived, obtained, reached

Past Passive Participle

PPP of pra-āp (to reach, obtain). Used here in locative absolute construction.

Prefix: pra

Root: āp (class 5)

Note: Agrees with ahani in a locative absolute construction.

राजा (rājā) - the king

(noun)

Nominative, masculine, singular of rājan

rājan - king, ruler

ससचिवः (sasacivaḥ) - with his ministers, accompanied by ministers

(adjective)

Nominative, masculine, singular of sasaciva

sasaciva - accompanied by ministers, having ministers

Compound type : bahuvrīhi (sa+saciva)

• sa – with, together with
  indeclinable
• saciva – minister, companion
  noun (masculine)

Note: Agrees with rājā.

तदा (tadā) - then, at that time

(indeclinable)

भीष्मम् (bhīṣmam) - Bhishma (accusative)

(proper noun)

Accusative, masculine, singular of bhīṣma

bhīṣma - Bhishma (proper name)

प्रमुखतः (pramukhataḥ) - in front, at the head, principally

(indeclinable)

Formed with suffix -tas from pramukha.

कृत्वा (kṛtvā) - having made, having placed, having done

(indeclinable)

Absolutive (gerund)

Formed from root kṛ with suffix -tvā.

Root: kṛ (class 8)

कृपम् (kṛpam) - Kripa (accusative)

(proper noun)

Accusative, masculine, singular of kṛpa

kṛpa - Kripa (proper name)

च (ca) - and

(indeclinable)

आचार्यसत्तमम् (ācāryasattamam) - the best of teachers, foremost preceptor

(noun)

Accusative, masculine, singular of ācāryasattama

ācāryasattama - best of teachers, most excellent preceptor

Compound type : tatpuruṣa (ācārya+sattama)

• ācārya – teacher, preceptor
  noun (masculine)
• sattama – best, most excellent
  adjective
  Superlative suffix -tama.

Note: Modifying kṛpam.