inexplicablein‧ex‧plic‧a‧ble /ˌɪnɪkˈsplɪkəbəl◂ $ ɪnˈeksplɪkəbəl, ˌɪnɪkˈsplɪk-/ adjective 
inexplicable behaviour For some inexplicable reason, he felt depressed.—inexplicably adverb
EXAMPLES FROM OTHER DICTIONARIES
- For some inexplicable reason, some rooms of the mansion will suddenly turn very cold.
THESAURUS
difficult to explain or understand, and often strange or slightly frightening: · the mysterious disappearance of ships in the waters of the Bermuda Triangle· What’s that mysterious noise?
difficult to explain or understand: · At first this must seem a puzzling question.· I found her attitude deeply puzzling.
impossible to understand, so that you feel very confused: · It was a baffling case.· Like many people, I find theoretical physics baffling.
formal impossible to explain: · For some inexplicable reason her mind went completely blank.· Some things in life are inexplicable.
formal mysterious and difficult to understand, but also often attractive or interesting – used especially about people, their expressions, or things they say: · She gave him an enigmatic smile.· an enigmatic remark
formal having a meaning that is difficult to understand, and is not expressed in a clear direct way – used especially about things that people say or write: · I got a rather cryptic message from him.· cryptic comments
if something is a mystery, you cannot understand how or why it happens: · Four years later, his death remains a complete mystery.· It’s all a mystery to me.
if an event or a situation, especially one that happened a long time ago, is shrouded in mystery, it is mysterious because no one knows exactly what happened: · Stone age civilization, veiled in mystery as it is, has provided the greatest challenge to historians.
COLLOCATIONS FROM THE ENTRY For some inexplicable reason, he felt depressed.COLLOCATIONS FROM THE CORPUSNOUN
For some inexplicable reason, he felt depressed.· For some inexplicable reason her spirits seemed to plummet earthwards.· For some inexplicable reason, the organization has not told the truth about its players' health.· For an inexplicable reason the low, billowy Donyo hills seemed to rise and to touch the sky.· For some inexplicable reason there seems to be a connection between weighing-in time and bingeing.· He had wanted to tell his father, but for some inexplicable reason, felt shy and slightly ashamed.· For some inexplicable reason her mind went completely blank.
WORD FAMILYadjectiveunexplainedexplanatoryexplicable ≠ inexplicablenounexplainingexplanationverbexplainadverbinexplicably
too unusual or strange to be explained or understood SYN incomprehensible, strange: inexplicable behaviour For some inexplicable reason, he felt depressed.—inexplicably adverb