

薄いスカートの下にはスリップを着ています。
最近はスリップを着る人が少なくなったそうです。
このドレス、透けるからスリップが必要じゃない?
"スリップ" is in the lesson "Clothes 2" (Level 3), 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.