ul SUFFIX
little, small, -let (Diminutive) target is of gender of root => decl;
lacul.us N 2 1 NOM S M
lacus, laci N (2nd) M [DXXDS] Late lesser
lacus, lacus N (4th) M [XXXAS]
basin/tank/tub; lake/pond; reservoir/cistern/basin, trough; lime-hole; bin; pit
ul SUFFIX
-ulus; of a, pertaining to a, in a condition of, in a state of;
lacul.us ADJ 1 1 NOM S M POS
lacus, laci N (2nd) M [DXXDS] Late lesser
lacus, lacus N (4th) M [XXXAS]
basin/tank/tub; lake/pond; reservoir/cistern/basin, trough; lime-hole; bin; pit

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.