issi SUFFIX
-est, most ~, much ~, makes SUPER;
distentissi.mum ADJ 0 0 NOM S N SUPER
distentissi.mum ADJ 0 0 VOC S N SUPER
distentissi.mum ADJ 0 0 ACC S M SUPER
distentissi.mum ADJ 0 0 ACC S N SUPER
distentus, distenta, distentum ADJ [XXXEE] uncommon
full, filled up; distended; occupied, busy;
issi SUFFIX
makes a verb PERF PPL into an adjective SUPER (amat.issimus => most/much loved)
distentissi.mum ADJ 0 0 NOM S N SUPER
distentissi.mum ADJ 0 0 VOC S N SUPER
distentissi.mum ADJ 0 0 ACC S M SUPER
distentissi.mum ADJ 0 0 ACC S N SUPER
distendo, distendere, distendi, distentus V (3rd) [XXXDX] lesser
stretch (apart); spread out; distend; extend; rack; detract, perplex;
distineo, distinere, distinui, distentus V (2nd) [XXXDX] lesser
keep apart, separate; prevent, hold up; distract;

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.