The English word 'Caste' is borrowed from which language?

NCERT (2025-26): “3.1 Caste and the Caste System … Although it is an institution characteristic of Hindu society, caste has spread to the major non-Hindu communities of the Indian sub-continent. This is specially true of Muslims, Christians and Sikhs. As is well-known, the English word ‘caste’ is actually a borrowing from the Portuguese casta, meaning pure breed. The word refers to a broad institutional arrangement that in Indian languages (beginning with the ancient Sanskrit) is referred to by two distinct terms, varna and jati.…”