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it is inexplicable that ...
It is inexplicable that he would leave without saying goodbye.
他不辞而别令人费解。
无法解释的；费解的
先理解核心含义，再看它在真实句子里的用法。
无法解释的；费解的
Impossible to explain; not easily accounted for.
It is inexplicable that he would leave without saying goodbye.
他不辞而别令人费解。
无法解释的；难以说明的。
Impossible to explain; not easily accounted for.
The sudden disappearance of the keys was inexplicable.
钥匙的突然消失令人费解。
She felt an inexplicable sadness even though everything was fine.
尽管一切都很顺利，她还是感到一种莫名的悲伤。
His inexplicable behavior made everyone suspicious.
他那令人费解的行为引起了所有人的怀疑。
It is inexplicable that he would leave without saying goodbye.
他不辞而别令人费解。
作前置定语，修饰名词。
She felt an inexplicable sadness.
她感到一种莫名的悲伤。
find + 宾语 + 宾补（形容词）。
I find his behavior inexplicable.
我觉得他的行为无法解释。
Not this
She cried inexplicable.
Use this
She cried inexplicably.
错误在于用形容词“inexplicable”修饰动词“cried”。英语中，修饰动词应使用副词“inexplicably”。
Not this
I am inexplicable about his answer.
Use this
His answer is inexplicable.
“inexplicable”只能描述事物或现象，不能描述人的心理状态。错误地将“be inexplicable”用于人，正确用法是描述事情本身无法解释。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
无法解释的谜团
The sudden disappearance of the plane remains an inexplicable mystery.
飞机的突然消失仍然是一个无法解释的谜团。
费解的行为
His inexplicable behavior worried his friends.
他费解的行为让朋友们很担心。
无法解释的现象
Scientists have observed an inexplicable phenomenon in the deep ocean.
科学家在深海观察到了一个无法解释的现象。
莫名其妙的延误
The passengers were frustrated by the inexplicable delay of the train.
火车莫名其妙的延误让乘客们很沮丧。
莫名的恐惧
She felt an inexplicable fear every time she entered that room.
每次走进那个房间，她都会感到一种莫名的恐惧。
Use inexplicable naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
in-（不）+ explicable（可解释的），所以是‘无法解释的’。想象谜题怎么也讲不通。
语域：formal 常见场景：formal writing、news reports、literary prose 「inexplicable」通常用于正式书面语，如新闻报道、学术或文学语境；日常口语中用「unexplainable」或「can't explain」更自然。
目标词读作 /ɪnˈɛksplɪkəbl/，重音在 -eks-。所列词中 explicable 读作 /ˈɛksplɪkəbl/ 时与目标词押韵；但 explicable 也有 /ɪkˈsplɪkəbl/ 的读法，重音落在 -plic-。applicable、replicable 等 -plicable 词重音位置不同，并不押韵；despicable、communicable、implacable 只是拼写相近，读音差异更大，需注意不要按拼写类推。
Dictionary facts from ECDICT, OCTANOVE, WIKTIONARY.