形容詞 inexplicable:

1. incapable of being explained or accounted for
   同義詞：incomprehensible

1. An event inexplicable by the laws of nature; a miracle.
   奇跡自然規(guī)律無法解釋的事實(shí); 奇跡
2. An inexplicable animus against intellectuals.
   對(duì)知識(shí)分子的莫名其妙的惡意

in.ex.pli.ca.ble

adj.（形容詞）
Difficult or impossible to explain or account for:
難以或無法解釋或說明的：
例句：
left the house at three in the morning for inexplicable reasons.
凌晨三點(diǎn)，莫名其妙地離開了房子

【引伸】
inex.plicabil.ity 或
inex.plicableness
n.（名詞）
inex.plicably
adv.（副詞）