वाल्मीकि-रामायणम् vālmīki-rāmāyaṇam - book-6, chapter-3, verse-15

द्वारेषु तासां चत्वारः संक्रमाः परमायताः ।
यन्त्रैरुपेता बहुभिर्महद्भिर्दृढसंधिभिः ॥१५॥

15. dvāreṣu tāsāṃ catvāraḥ saṃkramāḥ paramāyatāḥ ,
yantrairupetā bahubhirmahadbhirdṛḍhasaṃdhibhiḥ.

15. dvāreṣu tāsām catvāraḥ saṃkramāḥ paramāyatāḥ
yantraiḥ upetāḥ bahubhiḥ mahadbhiḥ dṛḍhasaṃdhibhiḥ

15. tāsām dvāreṣu catvāraḥ paramāyatāḥ bahubhiḥ
mahadbhiḥ dṛḍhasaṃdhibhiḥ yantraiḥ upetāḥ saṃkramāḥ

15. At the gates of those moats were four very long bridges, equipped with many large and strongly-jointed mechanisms.

Words meanings summery:

• द्वारेषु (dvāreṣu) - at the gates (in the gates, at the entrances)

• तासाम् (tāsām) - of those (moats) (of those (feminine))

• चत्वारः (catvāraḥ) - four

• संक्रमाः (saṁkramāḥ) - bridges (bridges, passages, crossings)

• परमायताः (paramāyatāḥ) - very long (very long, greatly extended)

• यन्त्रैः (yantraiḥ) - by mechanisms (by machines, by devices, by instruments)

• उपेताः (upetāḥ) - equipped with (endowed with, provided with, equipped with)

• बहुभिः (bahubhiḥ) - by many

• महद्भिः (mahadbhiḥ) - by large (mechanisms) (by great ones, by large ones)

• दृढसंधिभिः (dṛḍhasaṁdhibhiḥ) - with strong joints (with strong joints, having firm connections)

Words meanings and morphology

द्वारेषु (dvāreṣu) - at the gates (in the gates, at the entrances)

(noun)

Locative, neuter, plural of dvāra

dvāra - door, gate, entrance

तासाम् (tāsām) - of those (moats) (of those (feminine))

(pronoun)

Genitive, feminine, plural of tad

tad - that, those

चत्वारः (catvāraḥ) - four

(numeral)

संक्रमाः (saṁkramāḥ) - bridges (bridges, passages, crossings)

(noun)

Nominative, masculine, plural of saṃkrama

saṁkrama - a bridge, passage, transition

from sam + kram (to step)

Prefix: sam

Root: kram (class 1)

परमायताः (paramāyatāḥ) - very long (very long, greatly extended)

(adjective)

Nominative, masculine, plural of paramāyata

paramāyata - very long, greatly extended

compound of parama (supreme, greatest) + āyata (long, extended)

Compound type : karmadhāraya (parama+āyata)

• parama – supreme, highest, greatest
  adjective (masculine)
• āyata – long, extended, stretched
  adjective (masculine)
  Past Passive Participle
  from ā + root yam with suffix kta
  Prefix: ā
  Root: yam (class 1)

यन्त्रैः (yantraiḥ) - by mechanisms (by machines, by devices, by instruments)

(noun)

Instrumental, neuter, plural of yantra

yantra - machine, instrument, device, mechanism

from root yam (to control, restrain)

Root: yam (class 1)

उपेताः (upetāḥ) - equipped with (endowed with, provided with, equipped with)

(adjective)

Nominative, masculine, plural of upeta

upeta - endowed with, furnished with, provided with

Past Passive Participle

from upa + root i (to go) with suffix kta

Prefix: upa

Root: i (class 2)

बहुभिः (bahubhiḥ) - by many

(adjective)

Instrumental, neuter, plural of bahu

bahu - many, much, numerous

महद्भिः (mahadbhiḥ) - by large (mechanisms) (by great ones, by large ones)

(adjective)

Instrumental, neuter, plural of mahat

mahat - great, large, important

दृढसंधिभिः (dṛḍhasaṁdhibhiḥ) - with strong joints (with strong joints, having firm connections)

(adjective)

Instrumental, neuter, plural of dṛḍhasaṃdhi

dṛḍhasaṁdhi - having strong joints/connections

compound of dṛḍha (firm, strong) + saṃdhi (joint, connection)

Compound type : bahuvrīhi (dṛḍha+saṃdhi)

• dṛḍha – firm, strong, solid
  adjective (masculine)
  Past Passive Participle
  from root dṛh with suffix kta
  Root: dṛh (class 1)
• saṃdhi – joint, union, connection, treaty
  noun (masculine)
  from sam + root dhā
  Prefix: sam
  Root: dhā (class 3)