constern.are V 1 1 PRES ACTIVE INF 0 X
constern.are V 1 1 PRES PASSIVE IND 2 S Early
constern.are V 1 1 PRES PASSIVE IMP 2 S
consterno, consternare, consternavi, consternatus V (1st) TRANS [XXXCO]
confound/shock/confuse/perplex/dismay; terrify/alarm/frighten, drive frantic;
overcome; stretch/lay out upon the ground; excite to sedition/revolt/mutiny;
constern.are V 3 1 PRES PASSIVE SUB 2 S
consterno, consternere, constravi, constratus V (3rd) TRANS [XXXBO]
strew/cover/spread (rugs); cover/lay/pave/line; bring down, lay low; calm (sea)
Syncope r => v.r
Syncopated perfect often drops the 'v' and contracts vowel
consternav.ere V 1 1 PERF ACTIVE IND 3 P
consterno, consternare, consternavi, consternatus V (1st) TRANS [XXXCO]
confound/shock/confuse/perplex/dismay; terrify/alarm/frighten, drive frantic;
overcome; stretch/lay out upon the ground; excite to sedition/revolt/mutiny;

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.