महाभारतः mahābhārataḥ - book-13, chapter-110, verse-39

अष्टादशसहस्राणि वर्षाणां कल्पमेव च ।
कोटीशतसहस्रं च तेषु लोकेषु मोदते ॥३९॥

39. aṣṭādaśasahasrāṇi varṣāṇāṁ kalpameva ca ,
koṭīśatasahasraṁ ca teṣu lokeṣu modate.

39. aṣṭādaśasahasrāṇi varṣāṇām kalpam eva ca
| koṭīśatasahasram ca teṣu lokeṣu modate

39. (saḥ) teṣu lokeṣu aṣṭādaśasahasrāṇi varṣāṇām
kalpam eva ca koṭīśatasahasram ca modate

39. He delights in those worlds for eighteen thousand years; indeed, for a cosmic age (kalpa), and for a trillion (years).

Words meanings summery:

• अष्टादशसहस्राणि (aṣṭādaśasahasrāṇi) - eighteen thousands

• वर्षाणाम् (varṣāṇām) - of years

• कल्पम् (kalpam) - a cosmic age, a long period of time

• एव (eva) - indeed, certainly, only, just

• च (ca) - and, also

• कोटीशतसहस्रम् (koṭīśatasahasram) - a trillion (10^12)

• च (ca) - and, also

• तेषु (teṣu) - in those

• लोकेषु (lokeṣu) - in worlds, realms

• मोदते (modate) - rejoices, delights, is glad

Words meanings and morphology

अष्टादशसहस्राणि (aṣṭādaśasahasrāṇi) - eighteen thousands

(noun)

Nominative, neuter, plural of aṣṭādaśasahasra

aṣṭādaśasahasra - eighteen thousand

Compound type : tatpurusha (aṣṭādaśa+sahasra)

• aṣṭādaśa – eighteen
  numeral
• sahasra – thousand
  noun (neuter)

Note: Can be nominative or accusative, here denotes duration.

वर्षाणाम् (varṣāṇām) - of years

(noun)

Genitive, neuter, plural of varṣa

varṣa - year, rain, monsoon

Root: vṛṣ (class 1)

Note: Qualifies 'aṣṭādaśasahasrāṇi'.

कल्पम् (kalpam) - a cosmic age, a long period of time

(noun)

Accusative, masculine, singular of kalpa

kalpa - a cosmic age (4.32 billion years), a sacred precept, rule, method, division of time

Derived from √kḷp (to be able, fit, ordain)

Root: kḷp (class 1)

Note: Denotes duration.

एव (eva) - indeed, certainly, only, just

(indeclinable)

च (ca) - and, also

(indeclinable)

कोटीशतसहस्रम् (koṭīśatasahasram) - a trillion (10^12)

(noun)

Accusative, neuter, singular of koṭīśatasahasra

koṭīśatasahasra - a hundred thousand crores (10^12)

Compound type : tatpurusha (koṭi+śata+sahasra)

• koṭi – ten million, crore
  noun (feminine)
• śata – hundred
  numeral (neuter)
• sahasra – thousand
  noun (neuter)

Note: Denotes duration.

च (ca) - and, also

(indeclinable)

तेषु (teṣu) - in those

(pronoun)

Locative, masculine, plural of tad

tad - that, he, she, it

Note: Agrees with 'lokeṣu'.

लोकेषु (lokeṣu) - in worlds, realms

(noun)

Locative, masculine, plural of loka

loka - world, realm, universe, people

Root: lok (class 1)

मोदते (modate) - rejoices, delights, is glad

(verb)

3rd person , singular, middle, present (laṭ) of mud

Root: mud (class 1)

Note: Subject is implied (the man from previous verses).