

Этот диван очень удобный.
This sofa is very comfortable.
Какой удобный стул!
What a comfortable chair!
Это не очень удобный вариант.
This isn't a very convenient option.
"удобный" is in the lesson "Adjectives 1" (Level 2), along with 15 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.