

Das war wirklich dumm von mir.
[das ˈvaːɐ̯ ˈvɪrklɪç ˈdʊm ˈfɔn ˈmiːɐ̯.]
That was really stupid of me.
Du bist nicht dumm, nur müde.
[ˈduː ˈbɪst ˈnɪçt ˈdʊm, ˈnuːɐ̯ ˈmyːdə.]
You're not stupid, just tired.
Ist meine Frage zu dumm?
[ˈɪst ˈmaɪ̯nə ˈfraːɡə ˈtsuː ˈdʊm?]
Is my question too stupid?
"dumm" is in the lesson "Types of people" (Level 34), along with 10 other useful words. LinDuo has 180 topic lessons like this one, 2,375 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.