謎
睡眠は重要であるにもかかわらず、その役割は謎である。
Despite the importance of sleep, its purpose is a mystery.
近年では人間心理の謎を扱うサイコホラーも人気である。
Psycho-horror films dealing with the mysteries of human psychology are popular these days.
宝がどこに隠されているかは今なお謎である。
Where the treasure is hidden is still a mystery.
彼女の失踪で謎が一段と面白くなった。
Her disappearance gave zest to the mystery.
彼女がなぜ自殺したのかは今なお謎である。
It is still a mystery why she killed herself.
彼はついにその謎を解くてがかりを見つけた。
At last, he found a clue to the mystery.
彼はその謎を難なく解いた。
He had no difficulty in explaining the mystery.
彼はその謎を解く鍵を捜し出した。
He turned up a key to the solution of the mystery.
彼はその謎を解くために歴史的な文書を調べた。
He looked into historical documents to solve the mystery.
彼はその謎めいた事件を解決する手がかりを見つけた。
He found a clue to solve the mysterious affair.
I would like to draw your attention to the fact that Kanjisho uses multiple sources of data provided by third parties.
The search results are provided by the wonderful Jisho API which itself uses various data sources which you can find on the jisho's website. The data concerning the kanji strokes are provided by the KanjiVG project, under the CC BY 3.0 FR license. I also use Tatoeba to provide example sentences and Kuroshiro to obtain the furiganas and romajis versions of the sentences.
If you find any vices, errors or malfunctions, please let me know so that I can correct them.