

As minhas chaves desapareceram de cima da mesa.
O gato da Maria desapareceu há três dias.
Esta dor de cabeça não vai desaparecer tão cedo.
"desaparecer" is in the lesson "Verbs 21" (Level 44), along with 11 other useful words. LinDuo has 180 topic lessons like this one, 2,380 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.