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Sentence
Span Details
解き難い
difficult to solve; intractablei-adjective
謎
riddle; puzzle; enigma; mystery; enigmatic; mysteriousnoun, no-adjective
に
direction, time, indirect object, or target markergrammar
挑む。
challenge; throw down the gauntlet; contend for; tackle; attempt; go after; make sexual advances; pressure for sexgodan verb