lapsĭo, ōnis, f. [1. labor],
a sliding; trop., an inclination, tendency : haec in bonis rebus facilitas nominetur, in malis proclivitas, ut significet lapsionem, Cic. Tusc. 4, 12, 28.
lapsiō ōnis, f 2 LAB-.—Prop., a sliding ; hence, fig., readiness to fall . ...
An Elementary Latin Dictionary