improper.are V 1 1 PRES ACTIVE INF 0 X
improper.are V 1 1 PRES PASSIVE IND 2 S Early
improper.are V 1 1 PRES PASSIVE IMP 2 S
impropero, improperare, improperavi, improperatus V (1st) [XXXEO] uncommon
blame (person); reproach (with), taunt, upbraid (L+S);
impropero, improperare, improperavi, improperatus V (1st) INTRANS [XXXFS] veryrare
hasten into, enter hastily;
Syncope r => v.r
Syncopated perfect often drops the 'v' and contracts vowel
improperav.ere V 1 1 PERF ACTIVE IND 3 P
impropero, improperare, improperavi, improperatus V (1st) [XXXEO] uncommon
blame (person); reproach (with), taunt, upbraid (L+S);
impropero, improperare, improperavi, improperatus V (1st) INTRANS [XXXFS] veryrare
hasten into, enter hastily;

Credits:
This, our local install of the popular standby Whitaker's Words, is possible thanks to the resurrection of the venerable project at William Whitaker's Words, where you will also find extensive documentation. The corresponding GitHub repository is where you can submit issues about missing forms and analyses.
This web interface by Walter M. Shandruk.