Err

Definition:

(v. i.) To wander; to roam; to stray.
(v. i.) To deviate from the true course; to miss the thing aimed at.
(v. i.) To miss intellectual truth; to fall into error; to mistake in judgment or opinion; to be mistaken.
(v. i.) To deviate morally from the right way; to go astray, in a figurative sense; to do wrong; to sin.
(v. i.) To offend, as by erring.

Compare err with other words:

err vs. mismark

blunder vs. err

err vs. erroneous

err vs. mistake

err vs. unfathomable