Arabic formMeaning
بَشِّرُواGive glad tidings — command
لَا تُعَسِّرُواDo not make difficult — prohibition
أَطْعِمُواFeed — command
لَا تَسُبُّواDo not revile — prohibition
Many plural-address forms end in وا, but an ending alone does not determine the meaning. In prohibitions, look at the relationship of لَا with the verb. Imperatives instead directly request an action. The original context tells what the requested action concerns.