re PREFIX
- back, - again;
ar SUFFIX
means/instrument/place for special purpose of N/V (calco/calcar - tread/spur);
fontar.e N 3 4 LOC S N
fontar.e N 3 4 DAT S N Early
fons, fontis N (3rd) M [XXXAE]
spring, fountain, well; source/fount; principal cause; font; baptistry;
re PREFIX
- back, - again;
ar SUFFIX
-ary; of a, pertaining to a; (-like?);
fontar.e ADJ 3 2 NOM S N POS
fontar.e ADJ 3 2 VOC S N POS
fontar.e ADJ 3 2 ABL S X POS
fontar.e ADJ 3 2 ACC S N POS
fons, fontis N (3rd) M [XXXAE]
spring, fountain, well; source/fount; principal cause; font; baptistry;

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.