योगवासिष्ठः yogavāsiṣṭhaḥ - book-6, chapter-86, verse-20

कृताभिवन्दनं ब्रह्मा पौत्रमादाय तं तदा ।
अभिवादितवेदादिं स्वयमङ्के न्यवेशयत् ॥ २० ॥

kṛtābhivandanaṃ brahmā pautramādāya taṃ tadā ,
abhivāditavedādiṃ svayamaṅke nyaveśayat 20

20. kṛtābhivandanam brahmā pautram ādāya tam tadā
abhivāditavedādim svayam aṅke nyaveśayat

20. tadā brahmā kṛtābhivandanam abhivāditavedādim
tam pautram ādāya svayam aṅke nyaveśayat

20. Then, Brahma, taking that grandson who had offered his salutations and respectfully greeted the Vedas (veda) and the foundational knowledge, himself placed him on his lap.

Words meanings summery:

• कृताभिवन्दनम् (kṛtābhivandanam) - having offered salutations; one who has made obeisance

• ब्रह्मा (brahmā) - Brahma (the creator god)

• पौत्रम् (pautram) - grandson

• आदाय (ādāya) - having taken, taking, receiving

• तम् (tam) - him, that

• तदा (tadā) - then, at that time

• अभिवादितवेदादिम् (abhivāditavedādim) - who had saluted the Vedas (veda) and the beginning (of knowledge)

• स्वयम् (svayam) - himself, by himself, personally

• अङ्के (aṅke) - on the lap, in the lap

• न्यवेशयत् (nyaveśayat) - placed, caused to sit

Words meanings and morphology

कृताभिवन्दनम् (kṛtābhivandanam) - having offered salutations; one who has made obeisance

(adjective)

Accusative, masculine, singular of kṛtābhivandana

kṛtābhivandana - one who has offered obeisance, having made salutations

Past Passive Participle (kṛta) + Noun (abhivandana)

A Bahuvrīhi compound, 'one for whom salutation has been made'. Formed from kṛta (PPP of kṛ 'to do, make') and abhivandana (noun from abhi-√vand 'to salute').

Compound type : Bahuvrīhi (kṛta+abhivandana)

• kṛta – done, made, performed
  adjective (masculine/feminine/neuter)
  Past Passive Participle
  Derived from root kṛ (to do, make)
  Root: kṛ (class 8)
• abhivandana – salutation, obeisance, homage
  noun (neuter)
  Action noun from root vand with upasarga abhi
  Prefix: abhi
  Root: vand (class 1)

Note: Modifying pautram.

ब्रह्मा (brahmā) - Brahma (the creator god)

(proper noun)

Nominative, masculine, singular of brahman

brahman - Brahma (the creator god), sacred utterance, knowledge, ultimate reality (brahman)

Note: Subject of nyaveśayat.

पौत्रम् (pautram) - grandson

(noun)

Accusative, masculine, singular of pautra

pautra - grandson, son of a son

Derived from putra (son).

Note: Object of ādāya and nyaveśayat.

आदाय (ādāya) - having taken, taking, receiving

(indeclinable)

Absolutive (gerund)

Derived from root dā (to give) with upasarga ā (towards, to) in absolutive form.

Prefix: ā

Root: dā (class 3)

Note: Expresses an action completed before the main verb.

तम् (tam) - him, that

(pronoun)

Accusative, masculine, singular of tad

tad - that, him, her, it

Demonstrative pronoun.

Note: Modifies pautram.

तदा (tadā) - then, at that time

(indeclinable)

Adverbial form of tad.

Note: Adverb of time.

अभिवादितवेदादिम् (abhivāditavedādim) - who had saluted the Vedas (veda) and the beginning (of knowledge)

(adjective)

Accusative, masculine, singular of abhivāditavedādi

abhivāditavedādi - one who has saluted the Vedas and the beginning (of knowledge/scriptures)

PPP (abhivādita) + Noun (veda) + Noun (ādi)

Bahuvrīhi compound, 'one by whom the Vedas and the beginning have been saluted'. abhivādita is PPP from abhi-√vad (to salute, greet). veda means Veda. ādi means beginning, etc.

Compound type : Bahuvrīhi (abhivādita+veda+ādi)

• abhivādita – saluted, greeted, respected
  adjective (masculine/feminine/neuter)
  Past Passive Participle
  Derived from root vad (to speak) with upasarga abhi
  Prefix: abhi
  Root: vad (class 1)
• veda – Veda, sacred knowledge (veda)
  noun (masculine)
• ādi – beginning, first, etc.
  noun (masculine)

Note: Modifying pautram.

स्वयम् (svayam) - himself, by himself, personally

(indeclinable)

Adverb.

Note: Adverbial usage.

अङ्के (aṅke) - on the lap, in the lap

(noun)

Locative, masculine, singular of aṅka

aṅka - lap, side, proximity, mark

Note: Indicates location.

न्यवेशयत् (nyaveśayat) - placed, caused to sit

(verb)

3rd person , singular, active, Past Imperfect (laṅ) of ni√viś

Causative

Causative of root viś (to enter) with upasarga ni (down, in). Imperfect tense, 3rd person singular.

Prefix: ni

Root: viś (class 6)

Note: Main verb of the sentence.