Synonym: go wrong, misjudge, sin, slip. Similar words: cherry, terra, error, merry, terror, errant, terrain, erratic. Meaning: [ɜː] 
v. 1. to make a mistake or be incorrect 2. wander from a direct course or at random.
v. 1. to make a mistake or be incorrect 2. wander from a direct course or at random. 
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(1) To err is human, to forgive, divine. Alexander Pope 
(2) Talk much, and err much.
(3) It is the nature of every man to err, but only the fool perseveres in the error.
(4) To err is human.
(5) It is the nature of every man to err, but only the fool preserves in the error.
(6) To Err is Humane.
(7) It's always best to err on the side of caution .
(8) It is better to err on the side of mercy.
(9) They may be wise to err on the side of caution.
(10) I thought it was better to err on the side of caution .
(11) And yes(sentencedict .com), they did err.
(12) To err is human; to admit it, superhuman. Doug Larson
(13) We should err on the side of restraint, rather than of excess.
(14) Typically, Burgess says, forecasters err on the side of caution by issuing a severe storm warning.
(15) So they dropped a dime in order to err on the safe side.
(16) It is understandable for health authorities to err on the side of caution, as these guidelines will not apply to everyone.
(17) But travel agents are urging their clients to err on the side of caution.
(18) Any tribunal might err in a finding that it makes: no tribunal is infallible.
(19) Voltaire's work is, arguably, offensive but one should err on the side of allowing it to be available.
(20) The therapist should always err on the side of caution; the hypotheses set up are merely shrewd guesses.
(21) It is best therefore to err on the quiet side and to use percussion sparingly rather than to excess.
(22) For this reason the guidelines here tend to err on the cautious side.
(23) It's best to err on the safe side.
(24) To err is human, to purr is feline.
(25) In the election of a wife, as in a project of war, to err but once is to be undone for ever.
(26) Therefore, if the first two arguments were correct, it would be better to err on the side of generosity.
(27) Music as a background for drama is a much trickier area, but you should err on the side of understatement.
(28) Take your cue from the tone set by the interviewer but err on the side of formality.
(29) I may unnerve you by saying that many of us err in this.
(30) The legal system is composed of people, and people err.
More similar words: cherry, terra, error, merry, terror, errant, terrain, erratic, terrify, erratum, erroneous, ferret out, aberrant, terrible, terrific, terribly, herringbone, terrified, terrarium, terrorism, preferred, red herring, territory, interrupt, referring, blueberry, terrorist, deterrent, terrifying, strawberry.