adv.
不可解释地,不能说明地,无责任的

[ adv ]
in an unaccountable manner
<adv.all>
in the book, a tycoon unaccountably becomes the hero's friend

Unaccountable \Un`ac*count"a*ble\, a.
1. Not accountable or responsible; free from control.
--South.

2. Not to be accounted for; inexplicable; not consonant with
reason or rule; strange; mysterious.
※ -- {Un`ac*count"a*ble*ness}], n. --
{Un`ac*count"a*bly}, adv.