महाभारतः mahābhārataḥ - book-3, chapter-80, verse-15

कस्यचित्त्वथ कालस्य जपन्नेव महातपाः ।
ददर्शाद्भुतसंकाशं पुलस्त्यमृषिसत्तमम् ॥१५॥

15. kasyacittvatha kālasya japanneva mahātapāḥ ,
dadarśādbhutasaṁkāśaṁ pulastyamṛṣisattamam.

15. kasyacit tu atha kālasya japan eva mahātapāḥ
dadarśa adbhutasaṃkāśam pulastyam ṛṣisattamam

15. After some time, as he was continuously engaged in chanting (japa), the great ascetic (tapas) saw Pulastya, the foremost among sages, who had an astonishing appearance.

Words meanings summery:

• कस्यचित् (kasyacit) - of some (time) (of someone, of something, of some)

• तु (tu) - indeed (but, indeed, however)

• अथ (atha) - then, after that (then, now, thereupon)

• कालस्य (kālasya) - of time (after some time) (of time, of a period)

• जपन् (japan) - as he was chanting (japa) (chanting, muttering prayers)

• एव (eva) - continuously engaged (only, just, indeed, precisely)

• महातपाः (mahātapāḥ) - the great ascetic (tapas) (great ascetic, one of great asceticism)

• ददर्श (dadarśa) - saw (saw, beheld)

• अद्भुतसंकाशम् (adbhutasaṁkāśam) - astonishing in appearance (of astonishing appearance)

• पुलस्त्यम् (pulastyam) - Pulastya (Pulastya (name of a sage))

• ऋषिसत्तमम् (ṛṣisattamam) - foremost among sages (best among sages)

Words meanings and morphology

कस्यचित् (kasyacit) - of some (time) (of someone, of something, of some)

(pronoun)

Genitive, masculine, singular of kaścid

kaścid - someone, something, any, some

Note: Combination of interrogative pronoun 'ka' and particle 'cid'.

तु (tu) - indeed (but, indeed, however)

(indeclinable)

अथ (atha) - then, after that (then, now, thereupon)

(indeclinable)

कालस्य (kālasya) - of time (after some time) (of time, of a period)

(noun)

Genitive, masculine, singular of kāla

kāla - time, period, season, death

जपन् (japan) - as he was chanting (japa) (chanting, muttering prayers)

(adjective)

Nominative, masculine, singular of japan

jap - to mutter, to whisper, to chant (mantras)

Present Active Participle

Derived from root 'jap-' (to mutter, chant).

Root: jap (class 1)

Note: Functions as an adjective qualifying the subject 'mahātapāḥ'.

एव (eva) - continuously engaged (only, just, indeed, precisely)

(indeclinable)

महातपाः (mahātapāḥ) - the great ascetic (tapas) (great ascetic, one of great asceticism)

(noun)

Nominative, masculine, singular of mahātapas

mahātapas - great asceticism (tapas); one who performs great asceticism

Compound type : bahuvrīhi (mahat+tapas)

• mahat – great, large, mighty
  adjective (neuter)
• tapas – asceticism, penance, heat, spiritual fervor
  noun (neuter)
  Root: tap (class 1)

ददर्श (dadarśa) - saw (saw, beheld)

(verb)

3rd person , singular, active, perfect (lit) of dṛś

Root: dṛś (class 1)

अद्भुतसंकाशम् (adbhutasaṁkāśam) - astonishing in appearance (of astonishing appearance)

(adjective)

Accusative, masculine, singular of adbhutasaṃkāśa

adbhutasaṁkāśa - having an astonishing appearance, resembling a wonder

Compound type : tatpuruṣa (adbhuta+saṃkāśa)

• adbhuta – astonishing, wonderful, miraculous, strange
  adjective (neuter)
• saṃkāśa – resembling, like, appearance, aspect
  noun (masculine)
  Prefix: sam
  Root: kāś (class 1)

Note: Modifies 'Pulastyam'.

पुलस्त्यम् (pulastyam) - Pulastya (Pulastya (name of a sage))

(proper noun)

Accusative, masculine, singular of pulastya

pulastya - Pulastya (one of the ten Prajapatis, mind-born sons of Brahma, and a great Vedic sage)

ऋषिसत्तमम् (ṛṣisattamam) - foremost among sages (best among sages)

(adjective)

Accusative, masculine, singular of ṛṣisattama

ṛṣisattama - best of sages, most excellent sage

Compound type : tatpuruṣa (ṛṣi+sattama)

• ṛṣi – sage, seer, inspired poet
  noun (masculine)
• sattama – best, excellent, most eminent (superlative of sat)
  adjective (masculine)
  Superlative suffix -tama added to 'sat' (good, existent, true).
  Root: as (class 2)

Note: Modifies 'Pulastyam'.