err

/ˈer/

Middle English, from Anglo-French errer, from Latin errare to wander, err; akin to Old English ierre wandering, perverse, Goth airzeis deceived

verb

  1. to make a mistake

  2. to violate an accepted standard of conduct

  3. stray

erred in his calculations

idiom

  1. to use or show more of (something) than may be needed so that one can be sure that he or she is using or showing enough of it

It's better to err on the side of generosity than to appear too stingy.

idiom

  1. it is normal for people to make mistakes