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Portuguese word cacatua comes from Malay (macrolanguage) tua, Malay (macrolanguage) kakak, and later Malay (macrolanguage) kakaktua (Cockatoo (a parrot).).

Cacatua etymology ?

Cacatua detailed word origin explanation

Dictionary entryLanguageDefinition
tua Malay (macrolanguage) (msa) Old (of a living being: having lived for relatively many years). Ripe (ready for reaping or gathering, of fruits and seeds).
kakak Malay (macrolanguage) (msa) (rare) brother (older male sibling). (rare) sibling (older person who shares same parents). Sister (older woman or girl having the same parents). Term of address for a female acquaintance who is a bit older.
kakaktua Malay (macrolanguage) (msa) Cockatoo (a parrot).
cacatua Portuguese (por) Cockatoo (a bird).