inconsīdĕrantĭa, ae, f. [inconsiderans],
want of reflection , inconsiderateness (= temeritas, incuria): alicujus inconsiderantiam sustinere (where some read considerantiam), Cic. Q. Fr. 3, 9, 2: mirari inconsiderantiam (al. inconsiderationem), Suet. Claud. 39; Salv. Gub. Dei, 1, 11.
incōnsīderantia ae, f inconsiderans, want of reflection, inconsiderateness : alcuius. ...
An Elementary Latin Dictionary