

Не надо печалиться, всё будет хорошо.
Don't be sad, everything will be fine.
Она долго печалилась после отъезда сына.
She grieved for a long time after her son left.
О чём ты так печалишься в такой чудесный день?
What are you so sad about on such a wonderful day?
"печалиться" is in the lesson "Verbs 6" (Level 18), 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.