a. 1. Not accountable or responsible; free from control. South. [ 1913 Webster ]
2. Not to be accounted for; inexplicable; not consonant with reason or rule; strange; mysterious. [ 1913 Webster ]
-- Un`ac*count"a*ble*ness}, n. -- Un`ac*count"a*bly, adv. [ 1913 Webster ]
[ 1913 Webster ]