v. 25B6; verb
the judge had erred : MAKE A MISTAKE, be wrong, be in error, be mistaken, blunder, be incorrect, miscalculate, get it wrong; informal slip up, screw up, foul up, goof, make a boo-boo, bark up the wrong tree, get the wrong end of the stick; Brit. informal boob.
she struck them when they erred : MISBEHAVE, be bad, be naughty, get up to mischief, cause trouble; sin, transgress, lapse; clown about/around, fool about/around, act the goat; informal mess about/around, act up; Brit. informal play up.