concern.ere V 3 1 PRES ACTIVE INF 0 X
concern.ere V 3 1 PRES PASSIVE IND 2 S Early uncommon
concern.ere V 3 1 PRES PASSIVE IMP 2 S
concern.ere V 3 1 FUT PASSIVE IND 2 S
concerno, concernere, concrevi, concretus V (3rd) TRANS [DXXFS] Late veryrare
mix/mingle together (as in sieve in order to separate by sifting); sift/examine

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.