unexplained

Compared meaning: hard to understand or without an explanation (adjective).

比较义项：难以理解或缺乏解释的（形容词）。

• mysterious

  Emphasizes an air of strangeness, secrecy, or intrigue that arouses curiosity; often describes atmosphere, appearance, or behavior rather than strictly unexplainable facts. Common in narrative contexts, less formal than inexplicable.

  强调一种神秘、隐秘或引人好奇的气氛，常用来形容气氛、外表或行为，而不一定指绝对无法解释的事实；常见于叙述或描写语境，语气比inexplicable更随意。

  She gave a mysterious smile and refused to explain what she meant.

  她露出神秘的微笑，拒绝解释自己的意思。

• inexplicable

  Stresses that something defies any logical explanation at all, a stronger and more formal claim than the others; typically used for baffling events, actions, or phenomena that resist analysis.

  强调某事完全无法用逻辑解释，语气比其他两个词更强、更正式；通常用于令人困惑、难以分析的事件、行为或现象。

  He quit his stable job for reasons that seemed utterly inexplicable.

  他辞去了稳定的工作，原因似乎完全无法解释。

• unexplained 本词

  Neutral and factual: simply states that no explanation has yet been given, without implying strangeness or impossibility; common in reports, news, or investigations describing causes, noises, or absences.

  语气中性、客观，只是说明尚未给出解释，并不暗示事物奇异或不可能被解释；常见于报告、新闻或调查中描述原因、声音或缺席等情况。

  The fire's exact cause remained unexplained after months of investigation.

  经过数月调查，火灾的确切原因仍未得到解释。

All three describe confusing things without explanation, but with different strength. Mysterious suggests strangeness or secrecy that sparks curiosity. Inexplicable is stronger, more formal: something defies logical explanation entirely. Unexplained is neutral, simply stating no explanation has been given yet.

这三个词都可以形容令人困惑、缺乏解释的事物，但语气强弱和暗示不同：mysterious强调神秘莫测、引人好奇的气氛；inexplicable强调完全无法用逻辑解释，语气更强、更正式；unexplained语气最中性，只是客观陈述“尚未给出解释”，并不暗示事物奇异或不可能被解释。