erring

(verb) to make a mistake or be incorrect. Synonyms: err, mistake, slip.

(verb) wander from a direct course or at random. Synonyms: stray, err, drift. Examples: "The child strayed from the path and her parents lost sight of her." "Don't drift from the set course."

(adj) capable of making an error. Synonyms: error-prone. Example: "All men are error-prone."