वाल्मीकि-रामायणम् vālmīki-rāmāyaṇam - book-7, chapter-89, verse-5

दशवर्षसहस्राणि वाजिमेधमुपाकरोत् ।
वाजपेयान्दशगुणांस्तथा बहुसुवर्णकान् ॥५॥

5. daśavarṣasahasrāṇi vājimedhamupākarot ,
vājapeyāndaśaguṇāṃstathā bahusuvarṇakān.

5. daśavarṣasahasrāṇi vājimedham upākarot
vājapeyān daśaguṇān tathā bahusuvarṇakān

5. saḥ (implied) daśavarṣasahasrāṇi vājimedham
daśaguṇān vājapeyān tathā bahusuvarṇakān upākarot

5. He performed horse (vājimedha) Vedic rituals for ten thousand years, along with Vajapeya (vājapeya) rituals ten times that number, and many Bahusuvarṇaka (bahusuvarṇaka) rituals.

Words meanings summery:

• दशवर्षसहस्राणि (daśavarṣasahasrāṇi) - ten thousand years

• वाजिमेधम् (vājimedham) - horse Vedic ritual

• उपाकरोत् (upākarot) - he performed, he initiated

• वाजपेयान् (vājapeyān) - Vajapeya rituals

• दशगुणान् (daśaguṇān) - ten times that number of rituals (ten times, ten-fold)

• तथा (tathā) - and, thus, similarly

• बहुसुवर्णकान् (bahusuvarṇakān) - many Bahusuvarṇaka rituals

Words meanings and morphology

दशवर्षसहस्राणि (daśavarṣasahasrāṇi) - ten thousand years

(noun)

Accusative, neuter, plural of daśavarṣasahasra

daśavarṣasahasra - ten thousand years

Compound type : tatpuruṣa (daśan+varṣa+sahasra)

• daśan – ten
  numeral
• varṣa – year, rain
  noun (neuter)
• sahasra – thousand
  noun (neuter)

Note: Accusative of duration of time.

वाजिमेधम् (vājimedham) - horse Vedic ritual

(noun)

Accusative, masculine, singular of vājimedha

vājimedha - a major Vedic ritual (yajña) involving a horse, horse sacrifice

उपाकरोत् (upākarot) - he performed, he initiated

(verb)

3rd person , singular, active, aorist (luṅ) of kṛ

Aorist

3rd person singular, active voice

Prefixes: upa+ā

Root: kṛ (class 8)

वाजपेयान् (vājapeyān) - Vajapeya rituals

(noun)

Accusative, masculine, plural of vājapeya

vājapeya - a specific Vedic ritual (yajña) for power and sustenance, a type of soma ritual

दशगुणान् (daśaguṇān) - ten times that number of rituals (ten times, ten-fold)

(adjective)

Accusative, masculine, plural of daśaguṇa

daśaguṇa - ten-fold, ten times, multiplied by ten

Compound type : tatpuruṣa (daśan+guṇa)

• daśan – ten
  numeral
• guṇa – quality, attribute, multiple, strand
  noun (masculine)

तथा (tathā) - and, thus, similarly

(indeclinable)

बहुसुवर्णकान् (bahusuvarṇakān) - many Bahusuvarṇaka rituals

(noun)

Accusative, masculine, plural of bahusuvarṇaka

bahusuvarṇaka - a type of Vedic ritual (yajña) involving much gold, many golden things

Compound type : karmadhāraya (bahu+suvarṇaka)

• bahu – much, many, numerous
  adjective (masculine)
• suvarṇaka – golden, made of gold, a golden ornament, a particular coin
  noun (masculine)