

Sei bitte vorsichtig, die Straße ist glatt.
[ˈzaɪ̯ ˈbɪtə ˈfoːɐ̯zɪçtɪç, ˈdiː ˈʃtraːsə ˈɪst ˈɡlat.]
Please be careful, the road is slippery.
Fahr vorsichtig, es regnet stark.
[ˈfaːɐ̯ ˈfoːɐ̯zɪçtɪç, ˈɛs ˈreːɡnət ˈʃtark.]
Drive carefully, it's raining heavily.
Du musst mit dem Messer vorsichtig sein.
[ˈduː ˈmʊst ˈmɪt ˈdeːm ˈmɛsɐ ˈfoːɐ̯zɪçtɪç ˈzaɪ̯n.]
You have to be careful with the knife.
"vorsichtig" is in the lesson "Adjectives 6" (Level 40), 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.