instit.isse V 3 1 PERF ACTIVE INF 0 X
insisto, insistere, institi, - V (3rd) [XXXDX] lesser
stand/tread upon, stand, stop; press on, persevere (with); pursue, set about;
instit.isse V 1 1 PERF ACTIVE INF 0 X
insto, instare, institi, - V (1st) [XXXAX]
pursue, threaten; approach, press hard; be close to (w/DAT); stand in/on;

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.