idiosyncratic
UK: /ˌɪd.i.ə.sɪŋˈkræt.ɪk/ | US: /ˌɪd.i.oʊ.sɪŋˈkræt.ɪk/
adj. Peculiar or unique to an individual.
adj. Characterized by individualistic or unconventional traits.
The word traces back to Greek idiosynkrasia, combining idios (one's own, personal) + syn (together) + krasis (mixture or temperament). Originally, it referred to a unique physical or mental constitution. Over time, it evolved to describe distinctive behavioral or stylistic traits. The suffix -atic (via Latin -aticus) generalizes the adjective form.
Her idiosyncratic style made her artwork instantly recognizable.
The director’s films are known for their idiosyncratic humor.
His idiosyncratic habits include organizing books by color.
The software’s idiosyncratic design confused new users.
She appreciated his idiosyncratic way of solving problems.