n. 不加思索(考虑不周,粗心,轻率)

[ noun ]
the quality of failing to be considerate of others
<noun.attribute>

Inconsideration \In`con*sid`er*a"tion\, n. [L. inconsideratio:
cf. F. inconsid['e]ration.]
Lack of due consideration; inattention to consequences;
inconsiderateness.

Blindness of mind, inconsideration, precipitation.
--Jer. Taylor.

Not gross, willful, deliberate, crimes; but rather the
effects of inconsideration. --Sharp.