

ドアに親指をはさんでしまいました。
弟は親指だけでスマホに文字を入力するのが速いです。
「いいね」の意味で親指を立てるのは、日本でも通じますか?
"おやゆび(親指)" is in the lesson "Body parts 2" (Level 25), along with 8 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.