Synonyms of err in English:

err


See definition of err

verb

1‘the Court of Appeal ruled that the judge had erred in not allowing new evidence’

SYNONYMS
make a mistake, be wrong, be in error, be mistaken, mistake, make a blunder, blunder, be incorrect, be inaccurate, misjudge, miscalculate, get it wrong, get something wrong, get things wrong, bark up the wrong tree, get the wrong end of the stick, be wide of the mark
informal slip up, screw up, blow it, foul up, goof, boob, fluff something, make a hash of something, put one's foot in it, make a boo-boo, make a bloomer, drop a brick
vulgar slang fuck something up, bugger something up
ANTONYMS

be right

2‘she struck their fingers with a ruler when they erred’

SYNONYMS
misbehave, do wrong, go wrong, behave badly, misconduct oneself, be bad, be naughty, get up to mischief, get up to no good, act up, act badly, give someone trouble, cause someone trouble
sin, go astray, transgress, trespass, fall from grace, lapse, degenerate
clown about, clown around, fool about, fool around, act the clown, act the fool, act the goat, act foolishly, forget oneself
informal mess about, mess around
British informal muck about, muck around, play up