

Tens de amarrar bem o barco ao cais.
Amarrei a prancha ao tejadilho do carro.
Já amarraste o caiaque à árvore?
"amarrar" is in the lesson "Sports 1" (Level 23), along with 13 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.