uacill.are V 1 1 PRES ACTIVE INF 0 X
uacill.are V 1 1 PRES PASSIVE IND 2 S Early
uacill.are V 1 1 PRES PASSIVE IMP 2 S
vacillo, vacillare, vacillavi, vacillatus V (1st) [XXXDX] lesser
stagger, totter; be in a weak condition;
Syncope r => v.r
Syncopated perfect often drops the 'v' and contracts vowel
uacillav.ere V 1 1 PERF ACTIVE IND 3 P
vacillo, vacillare, vacillavi, vacillatus V (1st) [XXXDX] lesser
stagger, totter; be in a weak condition;

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.