harm·less 
(härmlĭs)
(härmlĭs)adj.
1. Not causing or incapable of causing harm.
2. Not intended to harm or offend; inoffensive.
3.
a. Of or relating to an error in a trial that would not change the outcome and therefore does not call for a reversal of the case on appeal.
b. Not giving rise to legal liability: an agreement to treat another party's behavior as harmless.
harmless·ly adv.
harmless·ness n.