

このズボンにはベルトがいります。
黒いベルトはありますか。
父の誕生日にベルトをあげました。
"ベルト" is in the lesson "Accessories" (Level 8), along with 17 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.