開ける
JLPT N2 · Verbひらける(hirakeru)声调 0
to open out (of a view, scenery, etc.); to spread out; to become clear (of a road, visibility, etc.); to improve (of luck, prospects, etc.); to get better; to develop (of a town, civilization, etc.)
開けた考え— An open-minded way of thinking.