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どうしたものか， どうしたもんか
1. what is to be done?, what should (I) do?, what (am I) to do?
tbd
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わかる， 分かる， 解る， 判る， 分る
1. to understand, to comprehend, to grasp, to see, to get, to follow
2. to become clear, to be known, to be discovered, to be realized, to be realised, to be found out
3. I know!, I think so too!
明白，理解；清楚，明确、被了解、被发现、被认识、被实现；明白！我也这么想！