वाल्मीकि-रामायणम् vālmīki-rāmāyaṇam - book-5, chapter-11, verse-21

ममेदं लङ्घनं व्यर्थं सागरस्य भविष्यति ।
प्रवेशश्चिव लङ्काया राक्षसानां च दर्शनम् ॥२१॥

21. mamedaṃ laṅghanaṃ vyarthaṃ sāgarasya bhaviṣyati ,
praveśaściva laṅkāyā rākṣasānāṃ ca darśanam.

21. mama idaṃ laṅghanaṃ vyarthaṃ sāgarasya bhaviṣyati
praveśaḥ ca iha laṅkāyāḥ rākṣasānām ca darśanam

21. This crossing of the ocean by me will be in vain, as will my entry into Laṅkā and the sight of the rākṣasas.

Words meanings summery:

• मम (mama) - my (my, of me)

• इदं (idaṁ) - this (this, this one)

• लङ्घनं (laṅghanaṁ) - crossing (the ocean) (leaping, jumping over, crossing, transgression)

• व्यर्थं (vyarthaṁ) - in vain (useless, in vain, fruitless, meaningless)

• सागरस्य (sāgarasya) - of the ocean

• भविष्यति (bhaviṣyati) - will be (will be, will become)

• प्रवेशः (praveśaḥ) - entry (entry, entrance, penetration)

• च (ca) - and (and, also)

• इह (iha) - here (in Laṅkā) (here, in this world, in this case)

• लङ्कायाः (laṅkāyāḥ) - of Laṅkā (of Laṅkā, from Laṅkā)

• राक्षसानाम् (rākṣasānām) - of the rākṣasas

• च (ca) - and (and, also)

• दर्शनम् (darśanam) - the sight (seeing, sight, vision, doctrine)

Words meanings and morphology

मम (mama) - my (my, of me)

(pronoun)

Genitive, singular of asmad

asmad - I, we

Genitive form of the first-person pronoun.

इदं (idaṁ) - this (this, this one)

(pronoun)

Nominative, neuter, singular of idam

idam - this, that

Demonstrative pronoun.

लङ्घनं (laṅghanaṁ) - crossing (the ocean) (leaping, jumping over, crossing, transgression)

(noun)

Nominative, neuter, singular of laṅghana

laṅghana - leaping, jumping over, crossing, transgressing

Verbal noun

From root laṅgh (to leap, to cross).

Root: laṅgh (class 1)

व्यर्थं (vyarthaṁ) - in vain (useless, in vain, fruitless, meaningless)

(adjective)

Nominative, neuter, singular of vyartha

vyartha - useless, in vain, fruitless, meaningless

Compound of vi (denoting separation, privation) and artha (purpose, meaning).

Compound type : avyayībhāva (vi+artha)

• vi – apart, away, without
  indeclinable
  Prefix meaning 'apart', 'away', 'without'.
• artha – purpose, meaning, wealth, object
  noun (masculine)

सागरस्य (sāgarasya) - of the ocean

(noun)

Genitive, masculine, singular of sāgara

sāgara - ocean, sea

From sāgara (with water).

भविष्यति (bhaviṣyati) - will be (will be, will become)

(verb)

3rd person , singular, active, future (lṛṭ) of bhū

Future tense formation.

Root: bhū (class 1)

प्रवेशः (praveśaḥ) - entry (entry, entrance, penetration)

(noun)

Nominative, masculine, singular of praveśa

praveśa - entry, entrance, penetration, initiation

Verbal noun

From root viś (to enter) with prefix pra.

Prefix: pra

Root: viś (class 6)

च (ca) - and (and, also)

(indeclinable)

Conjunction.

इह (iha) - here (in Laṅkā) (here, in this world, in this case)

(indeclinable)

Adverb of place.

लङ्कायाः (laṅkāyāḥ) - of Laṅkā (of Laṅkā, from Laṅkā)

(proper noun)

Genitive, feminine, singular of laṅkā

laṅkā - Laṅkā (proper name of Rāvaṇa's city)

राक्षसानाम् (rākṣasānām) - of the rākṣasas

(noun)

Genitive, masculine, plural of rākṣasa

rākṣasa - rākṣasa, demon, giant

Descendant of Rakṣas.

Root: rakṣ (class 1)

च (ca) - and (and, also)

(indeclinable)

Conjunction.

दर्शनम् (darśanam) - the sight (seeing, sight, vision, doctrine)

(noun)

Nominative, neuter, singular of darśana

darśana - seeing, sight, vision, doctrine, philosophy, appearance

Verbal noun

From root dṛś (to see) with suffix -ana.

Root: dṛś (class 1)