Misuser

Part of speech: noun

Definitions

1. An individual who uses a resource or tool incorrectly, potentially causing adverse effects or deterioration
2. A person who employs something in a misguided way, which may lead to improper outcomes or harm
3. A person who operates or applies something in an incorrect or improper manner causing potential problems

Etymology: "Misuser" is a plain formation: the noun "misuse," with the agent suffix "-er" added to name a person who misuses something. "Misuse" itself combines the prefix "mis-," meaning wrongly or badly, with "use," so a misuser is simply someone who uses something wrongly. The same pattern produces many English agent nouns, such as "mismanager" and "misreader," where the suffix turns a verb or noun into a term for the doer.

Synonyms: abuser, misappropriator