महाभारतः mahābhārataḥ - book-7, chapter-53, verse-51

यथा हि लक्ष्म चन्द्रे वै समुद्रे च यथा जलम् ।
एवमेतां प्रतिज्ञां मे सत्यां विद्धि जनार्दन ॥५१॥

51. yathā hi lakṣma candre vai samudre ca yathā jalam ,
evametāṁ pratijñāṁ me satyāṁ viddhi janārdana.

51. yathā hi lakṣma candre vai samudre ca yathā jalam
evam etām pratijñām me satyām viddhi janārdana

51. janārdana yathā hi candre lakṣma vai ca yathā
samudre jalam evam me etām pratijñām satyām viddhi

51. O Janardana, just as the mark (spot) is truly on the moon, and just as water is in the ocean, so too know this vow of mine to be true.

Words meanings summery:

• यथा (yathā) - as, just as, so that

• हि (hi) - indeed, certainly, for, because

• लक्ष्म (lakṣma) - the dark spot (the 'man in the moon') (mark, sign, characteristic, spot)

• चन्द्रे (candre) - in the moon, on the moon

• वै (vai) - indeed, verily, certainly (an emphatic particle)

• समुद्रे (samudre) - in the ocean, in the sea

• च (ca) - and, also, moreover

• जलम् (jalam) - water, fluid

• एवम् (evam) - thus, so, in this manner

• एताम् (etām) - this (feminine)

• प्रतिज्ञाम् (pratijñām) - vow, promise, assertion

• मे (me) - my, of me, to me

• सत्याम् (satyām) - true, real, truthful, genuine

• विद्धि (viddhi) - know, understand, consider

• जनार्दन (janārdana) - O Janardana (epithet of Vishnu/Krishna)

Words meanings and morphology

यथा (yathā) - as, just as, so that

(indeclinable)

हि (hi) - indeed, certainly, for, because

(indeclinable)

लक्ष्म (lakṣma) - the dark spot (the 'man in the moon') (mark, sign, characteristic, spot)

(noun)

Nominative, neuter, singular of lakṣman

lakṣman - mark, sign, token, characteristic; aim, goal

चन्द्रे (candre) - in the moon, on the moon

(noun)

Locative, masculine, singular of candra

candra - moon, luminous, shining

वै (vai) - indeed, verily, certainly (an emphatic particle)

(indeclinable)

समुद्रे (samudre) - in the ocean, in the sea

(noun)

Locative, masculine, singular of samudra

samudra - ocean, sea, large body of water

च (ca) - and, also, moreover

(indeclinable)

जलम् (jalam) - water, fluid

(noun)

Nominative, neuter, singular of jala

jala - water, fluid, moisture

एवम् (evam) - thus, so, in this manner

(indeclinable)

एताम् (etām) - this (feminine)

(pronoun)

Accusative, feminine, singular of etad

etad - this, that

प्रतिज्ञाम् (pratijñām) - vow, promise, assertion

(noun)

Accusative, feminine, singular of pratijñā

pratijñā - vow, promise, agreement, assertion, undertaking

From prati-jñā ('to acknowledge, promise')

Prefix: prati

Root: jñā (class 9)

मे (me) - my, of me, to me

(pronoun)

Genitive, singular of asmad

asmad - I, me, my

सत्याम् (satyām) - true, real, truthful, genuine

(adjective)

Accusative, feminine, singular of satya

satya - true, real, truthful, genuine, existent

From sat (being, existence)

Root: as (class 2)

विद्धि (viddhi) - know, understand, consider

(verb)

2nd person , singular, active, imperative (loṭ) of vid

Root: vid (class 2)

जनार्दन (janārdana) - O Janardana (epithet of Vishnu/Krishna)

(proper noun)

Vocative, masculine, singular of janārdana

janārdana - Janardana (an epithet of Vishnu/Krishna, meaning 'agitator of men' or 'giver of boons to men')

Compound type : tatpuruṣa (jana+ardana)

• jana – people, mankind, creature
  noun (masculine)
• ardana – agitating, tormenting, destroying; asking, requesting
  adjective (masculine)
  Agent noun/Adjective from root
  Derived from the root ṛd ('to torment, agitate, ask')
  Root: ṛd (class 1)