योगवासिष्ठः yogavāsiṣṭhaḥ - book-5, chapter-48, verse-4

इमास्ता मृतमातङ्गदन्तमाला वृतौ कृताः ।
अद्यापि संस्थिताः कल्पं प्रतिमेरुशिखा इव ॥ ४ ॥

imāstā mṛtamātaṅgadantamālā vṛtau kṛtāḥ ,
adyāpi saṃsthitāḥ kalpaṃ pratimeruśikhā iva 4

4. imāḥ tāḥ mṛtamātaṅgadantamālāḥ vṛtau kṛtāḥ
adya api saṃsthitāḥ kalpam pratimeruśikhāḥ iva

4. imāḥ tāḥ mṛtamātaṅgadantamālāḥ vṛtau kṛtāḥ (santi),
adya api kalpam saṃsthitāḥ,
pratimeruśikhāḥ iva

4. These are those garlands of tusks from dead elephants, which were fashioned into an enclosure and remain here even now for an entire cosmic age (kalpa), resembling mountain peaks encircling Mount Meru.

Words meanings summery:

• इमाः (imāḥ) - these (feminine plural nominative)

• ताः (tāḥ) - those (feminine plural nominative)

• मृतमातङ्गदन्तमालाः (mṛtamātaṅgadantamālāḥ) - garlands of tusks from dead elephants

• वृतौ (vṛtau) - in an enclosure, into a fence

• कृताः (kṛtāḥ) - made, done, created (feminine plural nominative)

• अद्य (adya) - today, now

• अपि (api) - even, also, too

• संस्थिताः (saṁsthitāḥ) - established, remaining, existing (feminine plural nominative)

• कल्पम् (kalpam) - for a cosmic age, for a long time

• प्रतिमेरुशिखाः (pratimeruśikhāḥ) - peaks around Meru, peaks of Meru

• इव (iva) - like, as if, similar to

Words meanings and morphology

इमाः (imāḥ) - these (feminine plural nominative)

(pronoun)

Nominative, feminine, plural of idam

idam - this, this one

ताः (tāḥ) - those (feminine plural nominative)

(pronoun)

Nominative, feminine, plural of tad

tad - that, that one

मृतमातङ्गदन्तमालाः (mṛtamātaṅgadantamālāḥ) - garlands of tusks from dead elephants

(noun)

Nominative, feminine, plural of mṛtamātaṅgadantamālā

mṛtamātaṅgadantamālā - garland of tusks from a dead elephant

Compound type : Tatpuruṣa (mṛtamātaṅgadanta+mālā)

• mṛtamātaṅgadanta – tusk of a dead elephant
  noun (masculine)
• mālā – garland, string, wreath
  noun (feminine)

वृतौ (vṛtau) - in an enclosure, into a fence

(noun)

Locative, feminine, singular of vṛti

vṛti - enclosure, fence, hedge

Root: vṛ (class 5)

कृताः (kṛtāḥ) - made, done, created (feminine plural nominative)

(verbal derivative)

अद्य (adya) - today, now

(indeclinable)

अपि (api) - even, also, too

(indeclinable)

संस्थिताः (saṁsthitāḥ) - established, remaining, existing (feminine plural nominative)

(verbal derivative)

कल्पम् (kalpam) - for a cosmic age, for a long time

(noun)

Accusative, masculine, singular of kalpa

kalpa - a cosmic age, an aeon; a rule, ordinance

Note: Accusative denotes duration of time.

प्रतिमेरुशिखाः (pratimeruśikhāḥ) - peaks around Meru, peaks of Meru

(noun)

Nominative, feminine, plural of pratimeruśikhā

pratimeruśikhā - peaks surrounding Mount Meru

Compound type : Bahuvrīhi (prati+meruśikhā)

• prati – towards, against, in respect of, each, every
  indeclinable
• meruśikhā – peak of Meru
  noun (feminine)

इव (iva) - like, as if, similar to

(indeclinable)