

おうしは気が荒いので、近づかないでください。
スペインの祭りでおうしが街を走る様子をテレビで見ました。
この牧場のおうしは一トン近くあるそうです。
"おうし(雄牛)" is in the lesson "Domestic animals" (Level 7), along with 13 other useful words. LinDuo has 180 topic lessons like this one, 2,379 words in total. Every word has an illustration, a transcription and pronunciation in a female and a male voice. Just 10–15 minutes a day is enough to learn them all. Free, and works offline.