महाभारतः mahābhārataḥ - book-5, chapter-29, verse-9

मासार्धमासानथ नक्षत्रयोगानतन्द्रितश्चन्द्रमा अभ्युपैति ।
अतन्द्रितो दहते जातवेदाः समिध्यमानः कर्म कुर्वन्प्रजाभ्यः ॥९॥

9. māsārdhamāsānatha nakṣatrayogā;natandritaścandramā abhyupaiti ,
atandrito dahate jātavedāḥ; samidhyamānaḥ karma kurvanprajābhyaḥ.

9. māsa ardhamāsān atha nakṣatrayogān
atandritaḥ candramā abhyupaiti
atandritaḥ dahate jātavedāḥ
samidhyamānaḥ karma kurvan prajābhyaḥ

9. The unwearied moon accurately follows the cycles of months, half-months, and the conjunctions of constellations. The unwearied fire (jātavedas) burns, blazing and performing its function for the benefit of all creatures.

Words meanings summery:

• मास (māsa) - month

• अर्धमासान् (ardhamāsān) - half-months

• अथ (atha) - and, moreover, then

• नक्षत्रयोगान् (nakṣatrayogān) - conjunctions of constellations, planetary positions

• अतन्द्रितः (atandritaḥ) - unwearied, vigilant, diligent

• चन्द्रमा (candramā) - the moon

• अभ्युपैति (abhyupaiti) - approaches, goes towards, follows, observes

• अतन्द्रितः (atandritaḥ) - unwearied, vigilant, diligent

• दहते (dahate) - burns, consumes with fire

• जातवेदाः (jātavedāḥ) - fire, all-knowing

• समिध्यमानः (samidhyamānaḥ) - being kindled, blazing

• कर्म (karma) - action, deed, function

• कुर्वन् (kurvan) - doing, performing, making

• प्रजाभ्यः (prajābhyaḥ) - for creatures, for living beings, for subjects

Words meanings and morphology

मास (māsa) - month

(noun)

Accusative, masculine, singular of māsa

māsa - month, moon

Note: Used as the first part of a compound.

अर्धमासान् (ardhamāsān) - half-months

(noun)

Accusative, masculine, plural of ardhamāsa

ardhamāsa - half-month (fortnight)

Compound type : tatpurusha (ardha+māsa)

• ardha – half, part
  noun (masculine)
• māsa – month
  noun (masculine)

अथ (atha) - and, moreover, then

(indeclinable)

नक्षत्रयोगान् (nakṣatrayogān) - conjunctions of constellations, planetary positions

(noun)

Accusative, masculine, plural of nakṣatrayoga

nakṣatrayoga - conjunction of stars/constellations, auspicious planetary position

Compound type : tatpurusha (nakṣatra+yoga)

• nakṣatra – star, constellation
  noun (neuter)
• yoga – conjunction, union, application, spiritual discipline
  noun (masculine)
  From root yuj 'to join'
  Root: yuj (class 7)

अतन्द्रितः (atandritaḥ) - unwearied, vigilant, diligent

(adjective)

Nominative, masculine, singular of atandrita

atandrita - unwearied, vigilant, diligent, not sluggish

Compound type : nañ-tatpuruṣa (a+tandrita)

• a – not, un-
  indeclinable
  Negative prefix
• tandrita – wearied, sluggish, lazy
  adjective (masculine)
  Past Passive Participle (derived from root tandra)
  Root: tandr

चन्द्रमा (candramā) - the moon

(noun)

Nominative, masculine, singular of candramas

candramas - the moon

अभ्युपैति (abhyupaiti) - approaches, goes towards, follows, observes

(verb)

3rd person , singular, active, present (lat) of i

root of class 2, with prefixes abhi- and upa-

Prefixes: abhi+upa

Root: i (class 2)

अतन्द्रितः (atandritaḥ) - unwearied, vigilant, diligent

(adjective)

Nominative, masculine, singular of atandrita

atandrita - unwearied, vigilant, diligent, not sluggish

Compound type : nañ-tatpuruṣa (a+tandrita)

• a – not, un-
  indeclinable
  Negative prefix
• tandrita – wearied, sluggish, lazy
  adjective (masculine)
  Past Passive Participle (derived from root tandra)
  Root: tandr

दहते (dahate) - burns, consumes with fire

(verb)

3rd person , singular, middle, present (lat) of dah

root of class 1, middle voice (ātmanepada)

Root: dah (class 1)

जातवेदाः (jātavedāḥ) - fire, all-knowing

(noun)

Nominative, masculine, singular of jātavedas

jātavedas - fire; one who knows all created beings; all-knowing (an epithet of Agni)

Compound type : bahuvrihi (jāta+vedas)

• jāta – born, produced, arisen
  adjective (masculine)
  Past Passive Participle
  From root jan 'to be born'
  Root: jan (class 4)
• vedas – knowledge, wisdom, wealth, property
  noun (neuter)
  From root vid 'to know'
  Root: vid (class 2)

समिध्यमानः (samidhyamānaḥ) - being kindled, blazing

(adjective)

Nominative, masculine, singular of samidhyamāna

samidhyamāna - being kindled, blazing, ignited

Present Middle Participle (passive sense)

Derived from root indh 'to kindle' with prefix sam-

Prefix: sam

Root: indh (class 7)

कर्म (karma) - action, deed, function

(noun)

Accusative, neuter, singular of karman

karman - action, deed, work, ritual, fate, effect of actions

From root kṛ 'to do'

Root: kṛ (class 8)

कुर्वन् (kurvan) - doing, performing, making

(adjective)

Nominative, masculine, singular of kurvat

kurvat - doing, performing, making

Present Active Participle

Derived from root kṛ 'to do'

Root: kṛ (class 8)

प्रजाभ्यः (prajābhyaḥ) - for creatures, for living beings, for subjects

(noun)

Dative, feminine, plural of prajā

prajā - creature, progeny, subjects, people

Note: Can also be ablative plural, but dative 'for the benefit of' fits better.