योगवासिष्ठः yogavāsiṣṭhaḥ - book-6, chapter-19, verse-21

संशान्तमनसः शान्ता एकान्ते ध्यानसंस्थितौ ।
तिष्ठाम इति निश्चित्य पितुः पार्श्वे वयं गताः ॥ २१ ॥

saṃśāntamanasaḥ śāntā ekānte dhyānasaṃsthitau ,
tiṣṭhāma iti niścitya pituḥ pārśve vayaṃ gatāḥ 21

21. saṃśāntamanasaḥ śāntāḥ ekānte dhyānasaṃsthitau
tiṣṭhāma iti niścitya pituḥ pārśve vayam gatāḥ

21. vayam saṃśāntamanasaḥ śāntāḥ ekānte dhyānasaṃsthitau
tiṣṭhāma iti niścitya pituḥ pārśve gatāḥ

21. Having resolved, 'With our minds completely tranquil and serene, let us remain in a solitary place, absorbed in meditation (dhyāna),' we went to our father's side.

Words meanings summery:

• संशान्तमनसः (saṁśāntamanasaḥ) - (those) whose minds are completely tranquil (of tranquil mind, whose mind is completely peaceful)

• शान्ताः (śāntāḥ) - tranquil (ones) (peaceful, tranquil, calm ones)

• एकान्ते (ekānte) - in a solitary place (in a solitary place, in solitude, apart)

• ध्यानसंस्थितौ (dhyānasaṁsthitau) - absorbed in meditation (dhyāna) (in absorption in meditation, in the state of meditation)

• तिष्ठाम (tiṣṭhāma) - let us remain (let us remain, we remain, we stand)

• इति (iti) - thus (marking the preceding statement as a decision) (thus, in this manner (marks a quotation or conclusion))

• निश्चित्य (niścitya) - having resolved (having ascertained, having decided, having resolved)

• पितुः (pituḥ) - of the father

• पार्श्वे (pārśve) - by the side (of the father) (by the side, near, in the vicinity)

• वयम् (vayam) - we (the speakers) (we)

• गताः (gatāḥ) - went (gone, arrived, gone to)

Words meanings and morphology

संशान्तमनसः (saṁśāntamanasaḥ) - (those) whose minds are completely tranquil (of tranquil mind, whose mind is completely peaceful)

(adjective)

Nominative, masculine, plural of saṃśāntamanas

saṁśāntamanas - of tranquil mind, whose mind is perfectly calm

Bahuvrīhi compound.

Compound type : bahuvrīhi (sam+śānta+manas)

• sam – completely, thoroughly, together
  indeclinable
  Prefix
• śānta – peaceful, calm, tranquil, quiet
  adjective (masculine)
  Past Passive Participle
  From root śam (to be calm).
  Root: śam (class 4)
• manas – mind, intellect, heart
  noun (neuter)
  Root: man (class 4)

Note: Refers to vayam.

शान्ताः (śāntāḥ) - tranquil (ones) (peaceful, tranquil, calm ones)

(adjective)

Nominative, masculine, plural of śānta

śānta - peaceful, calm, tranquil, quiet

Past Passive Participle

From root śam (to be calm).

Root: śam (class 4)

Note: Refers to vayam.

एकान्ते (ekānte) - in a solitary place (in a solitary place, in solitude, apart)

(noun)

Locative, masculine, singular of ekānta

ekānta - solitary place, privacy, seclusion

Compound type : tatpuruṣa (eka+anta)

• eka – one, single, alone
  numeral/adjective (masculine)
• anta – end, limit, vicinity, side
  noun (masculine)

ध्यानसंस्थितौ (dhyānasaṁsthitau) - absorbed in meditation (dhyāna) (in absorption in meditation, in the state of meditation)

(noun)

Locative, feminine, singular of dhyānasaṃsthiti

dhyānasaṁsthiti - absorption in meditation, firm establishment in meditation

Tatpuruṣa compound.

Compound type : tatpuruṣa (dhyāna+saṃsthiti)

• dhyāna – meditation, contemplation
  noun (neuter)
  verbal noun
  From root dhyai.
  Root: dhyai (class 1)
• saṃsthiti – fixed position, firm establishment, state of being
  noun (feminine)
  verbal noun
  From sam-sthā (to stand together, be firmly fixed).
  Prefix: sam
  Root: sthā (class 1)

तिष्ठाम (tiṣṭhāma) - let us remain (let us remain, we remain, we stand)

(verb)

1st person , plural, active, present (loṭ) of sthā

Present tense, first person plural (Parasmaipada)

Represents both the present indicative (tiṣṭhāmaḥ) and present imperative (tiṣṭhāma) forms in the 1st person plural. Context suggests imperative ("let us").

Root: sthā (class 1)

Note: Interpreted as imperative "let us remain" in context.

इति (iti) - thus (marking the preceding statement as a decision) (thus, in this manner (marks a quotation or conclusion))

(indeclinable)

निश्चित्य (niścitya) - having resolved (having ascertained, having decided, having resolved)

(indeclinable)

Absolutive (Gerund)

From root ci with prefix niś.

Prefix: niś

Root: ci (class 5)

पितुः (pituḥ) - of the father

(noun)

Genitive, masculine, singular of pitṛ

pitṛ - father

पार्श्वे (pārśve) - by the side (of the father) (by the side, near, in the vicinity)

(noun)

Locative, masculine, singular of pārśva

pārśva - side, flank, proximity

वयम् (vayam) - we (the speakers) (we)

(pronoun)

Nominative, plural of asmad

asmad - I, we (first person pronoun)

गताः (gatāḥ) - went (gone, arrived, gone to)

(adjective)

Nominative, masculine, plural of gata

gata - gone, arrived, reached

Past Passive Participle

From root gam (to go).

Root: gam (class 1)

Note: Used here like a finite verb "we went".