The structure is a clipped shortening of "kangaroo," dropping the first two syllables for a quicker, more casual noun. It is used in Australian English to mean a kangaroo, often in conversation about wildlife, farming, or road hazards (e.g., "roo bar" for a bullbar). People typically say "Look out for roos on the road" or "We saw a mob of roos."

英語での「roo」の定義と意味

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