महाभारतः mahābhārataḥ - book-1, chapter-67, verse-26

क्षत्रियस्य हि गान्धर्वो विवाहः श्रेष्ठ उच्यते ।
सकामायाः सकामेन निर्मन्त्रो रहसि स्मृतः ॥२६॥

26. kṣatriyasya hi gāndharvo vivāhaḥ śreṣṭha ucyate ,
sakāmāyāḥ sakāmena nirmantro rahasi smṛtaḥ.

26. kṣatriyasya hi gāndharvaḥ vivāhaḥ śreṣṭhaḥ ucyate
sakāmāyāḥ sakāmena nirmantraḥ rahasi smṛtaḥ

26. For indeed, the Gāndharva form of marriage is declared the best for a kṣatriya. It is remembered (as valid) when a desirous woman and a desirous man unite secretly, without ritual mantras.

Words meanings summery:

• क्षत्रियस्य (kṣatriyasya) - for a kṣatriya (of a kṣatriya, for a kṣatriya)

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

• गान्धर्वः (gāndharvaḥ) - the Gāndharva (marriage) (Gāndharva (form of marriage), relating to Gandharvas)

• विवाहः (vivāhaḥ) - marriage (marriage, wedding)

• श्रेष्ठः (śreṣṭhaḥ) - the best (best, excellent, principal)

• उच्यते (ucyate) - is declared (it is said, it is declared, it is called)

• सकामायाः (sakāmāyāḥ) - of a desirous woman (of a desirous woman, for a desirous woman)

• सकामेन (sakāmena) - with a desirous man (by a desirous man, with a desirous man)

• निर्मन्त्रः (nirmantraḥ) - without ritual mantras (without mantras, without sacred formulas)

• रहसि (rahasi) - in secret (in secret, privately, in solitude)

• स्मृतः (smṛtaḥ) - is remembered (as valid) (remembered, recollected, considered)

Words meanings and morphology

क्षत्रियस्य (kṣatriyasya) - for a kṣatriya (of a kṣatriya, for a kṣatriya)

(noun)

Genitive, masculine, singular of kṣatriya

kṣatriya - a member of the warrior/ruling class, a kṣatriya

Root: kṣi (class 2)

Note: Indicates for whom the marriage is suitable.

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

(indeclinable)

Particle expressing cause or affirmation.

गान्धर्वः (gāndharvaḥ) - the Gāndharva (marriage) (Gāndharva (form of marriage), relating to Gandharvas)

(adjective)

Nominative, masculine, singular of gāndharva

gāndharva - relating to Gandharvas; a type of marriage (love marriage)

Derived from Gandharva (celestial musician/lover).

Note: Agrees with vivāhaḥ.

विवाहः (vivāhaḥ) - marriage (marriage, wedding)

(noun)

Nominative, masculine, singular of vivāha

vivāha - marriage, wedding, taking home (a bride)

From root vah with prefix vi.

Prefix: vi

Root: vah (class 1)

Note: Subject of ucyate.

श्रेष्ठः (śreṣṭhaḥ) - the best (best, excellent, principal)

(adjective)

Nominative, masculine, singular of śreṣṭha

śreṣṭha - best, most excellent, chief, principal

Superlative

Superlative form of praśasya (excellent).

Note: Predicate adjective for vivāhaḥ.

उच्यते (ucyate) - is declared (it is said, it is declared, it is called)

(verb)

3rd person , singular, passive, present (laṭ) of vac

Present Tense, Passive Voice

3rd person singular, present, passive voice

Root: vac (class 2)

सकामायाः (sakāmāyāḥ) - of a desirous woman (of a desirous woman, for a desirous woman)

(adjective)

Genitive, feminine, singular of sakāmā

sakāmā - desirous, longing for, passionate (feminine)

Bahuvrīhi compound: sa (with) + kāma (desire), feminine form.

Compound type : bahuvrīhi (sa+kāma)

• sa – with, together with
  indeclinable
  Prefix meaning 'with'
• kāma – desire, wish, love
  noun (masculine)
  Root: kam (class 1)

Note: Describes the woman (Śakuntalā).

सकामेन (sakāmena) - with a desirous man (by a desirous man, with a desirous man)

(adjective)

Instrumental, masculine, singular of sakāma

sakāma - desirous, longing for, passionate (masculine)

Bahuvrīhi compound: sa (with) + kāma (desire), masculine form.

Compound type : bahuvrīhi (sa+kāma)

• sa – with, together with
  indeclinable
  Prefix meaning 'with'
• kāma – desire, wish, love
  noun (masculine)
  Root: kam (class 1)

Note: Describes the man (Duṣyanta).

निर्मन्त्रः (nirmantraḥ) - without ritual mantras (without mantras, without sacred formulas)

(adjective)

Nominative, masculine, singular of nirmantra

nirmantra - without mantras, devoid of sacred formulas

Avyayībhāva compound (or Bahuvrīhi): nir (without) + mantra (mantra)

Compound type : avyayībhāva (nir+mantra)

• nir – without, out of, away from
  indeclinable
  Prefix meaning 'without' or 'out'
• mantra – sacred verse, spell, incantation, ritual formula
  noun (masculine)
  Root: man (class 4)

Note: Describes the nature of the Gandharva marriage.

रहसि (rahasi) - in secret (in secret, privately, in solitude)

(noun)

Locative, neuter, singular of rahas

rahas - secret, privacy, solitude, a secluded place

S-stem neuter noun. Locative singular form.

Root: rah (class 1)

Note: Describes the manner of the union.

स्मृतः (smṛtaḥ) - is remembered (as valid) (remembered, recollected, considered)

(adjective)

Nominative, masculine, singular of smṛta

smṛta - remembered, recollected, considered, prescribed (in sacred texts)

Past Passive Participle

From root smṛ + kta, masculine, singular, nominative.

Root: smṛ (class 1)

Note: Implies "it is considered" or "it is laid down (in Smritis)".