kind and sympathetic
親切で同情的 (shinsetsu de dōjō-teki)
"She is a warm-hearted person who cares for everyone."
"彼女はすべての人を気にかける親切な人です。" (Kanojo wa subete no hito o ki ni kakeru **shinsetsu na** hito desu.)
a simple solution to a complex problem
to gain new energy or enthusiasm for something
a significant improvement or shift
There is no point in worrying about past mistakes.
to feel extremely nervous or anxious
to become difficult to control