योगवासिष्ठः yogavāsiṣṭhaḥ - book-5, chapter-28, verse-4

कुबेरयमशक्राद्या उपायनकराः सुराः ।
यक्षविद्याधरा नागाः सेवावसरकाङ्क्षिणः ॥ ४ ॥

kuberayamaśakrādyā upāyanakarāḥ surāḥ ,
yakṣavidyādharā nāgāḥ sevāvasarakāṅkṣiṇaḥ 4

4. kubera-yama-śakra-ādyāḥ upāyana-karāḥ surāḥ
yakṣa-vidyādharāḥ nāgāḥ sevā-avasara-kāṅkṣiṇaḥ

4. kubera-yama-śakra-ādyāḥ upāyana-karāḥ surāḥ,
yakṣa-vidyādharāḥ nāgāḥ ca sevā-avasara-kāṅkṣiṇaḥ

4. Gods like Kubera, Yama, and Śakra, bearing gifts, as well as Yakṣas, Vidyādharas, and Nāgas, all desiring an opportunity for service, [were also there].

Words meanings summery:

• कुबेर-यम-शक्र-आद्याः (kubera-yama-śakra-ādyāḥ) - those beginning with Kubera, Yama, and Śakra; Kubera, Yama, Śakra and others

• उपायन-कराः (upāyana-karāḥ) - gift-bearers, bringing gifts, tribute-bearers

• सुराः (surāḥ) - gods, deities

• यक्ष-विद्याधराः (yakṣa-vidyādharāḥ) - Yakṣas and Vidyādharas

• नागाः (nāgāḥ) - Nāgas (a race of serpent-beings) (Nāgas, serpents, elephant)

• सेवा-अवसर-काङ्क्षिणः (sevā-avasara-kāṅkṣiṇaḥ) - desiring an opportunity for service, seeking a chance to serve

Words meanings and morphology

कुबेर-यम-शक्र-आद्याः (kubera-yama-śakra-ādyāḥ) - those beginning with Kubera, Yama, and Śakra; Kubera, Yama, Śakra and others

(compound)

Compound type : dvandva (kubera+yama+śakra+ādi)

• kubera – Kubera, the god of wealth and chief of the Yakṣas
  proper noun (masculine)
• yama – Yama, the god of death and justice
  proper noun (masculine)
• śakra – Śakra, a name of Indra, king of gods
  proper noun (masculine)
• ādi – beginning, commencement; first, and so on
  noun (masculine)

Note: Collective noun referring to a group of gods.

उपायन-कराः (upāyana-karāḥ) - gift-bearers, bringing gifts, tribute-bearers

(compound)

Compound type : tatpuruṣa (upāyana+kara)

• upāyana – a present, gift, offering, tribute
  noun (neuter)
  Prefix: upa
  Root: i (class 2)
• kara – making, doing, performing; a doer, maker, hand, ray
  adjective (masculine)
  agent noun/adjective from root kṛ
  suffix -a
  Root: kṛ (class 8)

Note: Adjective modifying surāḥ.

सुराः (surāḥ) - gods, deities

(noun)

Nominative, masculine, plural of sura

sura - a god, deity

Note: Appositional to kubera-yama-śakra-ādyāḥ.

यक्ष-विद्याधराः (yakṣa-vidyādharāḥ) - Yakṣas and Vidyādharas

(compound)

Compound type : dvandva (yakṣa+vidyādhara)

• yakṣa – a class of semi-divine beings, attendants of Kubera
  noun (masculine)
• vidyādhara – a class of supernatural beings, a wizard, knowing magic spells
  noun (masculine)

Note: Subjects of an implied verb 'were present'.

नागाः (nāgāḥ) - Nāgas (a race of serpent-beings) (Nāgas, serpents, elephant)

(noun)

Nominative, masculine, plural of nāga

nāga - a serpent, snake, cobra; a Nāga (mythical serpent-being); an elephant

Note: Another class of mythical beings.

सेवा-अवसर-काङ्क्षिणः (sevā-avasara-kāṅkṣiṇaḥ) - desiring an opportunity for service, seeking a chance to serve

(compound)

Compound type : tatpuruṣa (sevā+avasara+kāṅkṣin)

• sevā – service, worship, attendance
  noun (feminine)
  Root: sev (class 1)
• avasara – opportunity, occasion, proper time
  noun (masculine)
  Prefix: ava
  Root: sṛ (class 1)
• kāṅkṣin – desiring, wishing for, longing
  adjective (masculine)
  agent noun/adjective from root kāṅkṣ
  suffix -in
  Root: kāṅkṣ (class 1)

Note: Adjective modifying Yakṣas, Vidyādharas, and Nāgas.