sicko
UK[ˈsɪkəʊ]US[ˈsɪkoʊ]
n
A person who is mentally ill or who behaves in a strange, offensive, or frightening way, especially someone who enjoys cruel or violent things.
Morpheme Breakdown
sick
o
sick
ill
o
noun suffix
Etymology
The word "sicko" is a modern English slang formation, emerging in the latter half of the 20th century. It is constructed from the adjective "sick," which has its roots in the Old English sēoc, meaning "ill" or "ailing," a term of Germanic origin. Over time, "sick" developed a figurative sense describing something morbid, perverted, or disturbing. The appended "-o" is an informal, productive suffix in English, used to create nouns that label a person characterized by the quality of the preceding stem. Thus, the literal construction "one who is sick" evolved logically into its contemporary abstract meaning: a person who is psychologically disturbed or who derives pleasure from grotesque or cruel acts.
Analysis
Structure: sick (ill) + o (noun suffix)
- sick: From Old English sēoc (ill, diseased). In this compound, it carries the metaphorical sense of "morally or mentally unsound."
- o: A colloquial noun-forming suffix of English origin, often used to create informal, sometimes derogatory, terms for a person associated with the base word (e.g., weirdo, kiddo).
Examples
The film's villain is a complete sicko who terrorizes the neighborhood.
Only a real sicko would find that kind of violent imagery amusing.
The tabloids labeled the criminal a depraved sicko.