charlatan
UK[ˈʃɑː.lə.tən]US[ˈʃɑːr.lə.tən]
n
a person who pretends to have more knowledge or skill than they really have, especially in medicine or health.
n
a person who falsely claims to have a special knowledge or skill; a fraud.
Etymology
the word 'charlatan' entered english in the early 17th century from the french 'charlatan', which itself was borrowed from the italian 'ciarlatano'. the italian term is a blend of 'ciarlare', meaning 'to chatter or prattle', and 'cerretano', a term for a resident of cerreto, a village known for producing quacks and mountebanks. the core logic of the word thus connects empty, deceptive talk with fraudulent practice, originally in the selling of medicines and cures. this etymological journey perfectly encapsulates the modern meaning of a person who uses persuasive but false claims to mask a lack of genuine expertise.
Analysis
the word is a loanword adopted as a whole unit from italian. it is not productively segmented into meaningful morphemes in modern english.
Examples
the market was full of charlatans selling fake elixirs and miracle cures.
he was exposed as a charlatan when his financial predictions proved utterly wrong.
she warned them not to trust the self-proclaimed guru, calling him a dangerous charlatan.