issi SUFFIX
makes a verb PERF PPL into an adjective SUPER (amat.issimus => most/much loved)
exploratissi.mo ADJ 0 0 DAT S M SUPER
exploratissi.mo ADJ 0 0 DAT S N SUPER
exploratissi.mo ADJ 0 0 ABL S M SUPER
exploratissi.mo ADJ 0 0 ABL S N SUPER
exploro, explorare, exploravi, exploratus V (1st) [XXXBX]
search out, explore; test, try out; reconnoiter, investigate;

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.