• kauravāḥ — the Kurus
  The collective name for Dhṛtarāṣṭra's sons and the wider Kuru party. Throughout the Mahābhārata they oppose the Pāṇḍavas, friends of Kṛṣṇa — this episode foreshadows that larger fracture.
• durvinītaḥ — ill-behaved, untrained
  Literally 'badly disciplined.' The Kurus apply the word to Sāmba while themselves displaying the deeper durvinīta — disrespect to a son of Bhagavān.
• arbhakaḥ — boy, child
  Dismissive — they see only youth, not lineage. Soon Balarāma will remind them that this 'child' is the son of acintya Kṛṣṇa.
• akāmām — unwilling
  The Kurus' charge. But Lakṣmaṇā herself had inwardly chosen Sāmba — the svayaṁvara was her chance to declare him. The 'unwilling' is the Kuru frame, not Lakṣmaṇā's heart.
• balāt — by force
  The same accusation Śiśupāla's faction hurled at Kṛṣṇa over Rukmiṇī. Force is needed precisely because the bride's family obstructs her chosen mate.

• BCaitanyaS SB 10-68-02-24 - The Marriage of Samba Part 01 - Durban
  His Holiness Bhakti Caitanya Swami· English

When a lion's cub plays in a forest the deer call it ill-bred; they do not yet realize the father is watching from the rocks. The Kurus see only an 'ill-behaved boy' and miss whose son stands before them.