inexplicable
adj
ˌɪnɪkˈsplɪkəbəl◄
adj
1
too
unusual
or
strange
to
be
explained
or
understood
〔由于不寻常或太奇怪而〕无法解释的，费解的;
inexplicable
behaviour
费解的行为
For
some
inexplicable
reason
,
he
felt
depressed.
他无端地感到很沮丧。