

嬉しくて、思わず大声で叫んでしまいました。
電車の中で大声で話すのはやめましょう。
どうしてそんなに大声で怒っているんですか。
"おおごえで(大声で)" is in the lesson "Emotions" (Level 42), along with 11 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.