IPA: /ɪnˈɑːtɪstɪkli/
KK: /ɪnˈɑːrtɪstɪkli/
In a way that lacks artistic quality or skill; not done with creativity or style.
The painting was inartistically done, lacking any sense of beauty or technique.
Inartistically → It is formed from "in-" (meaning not) and "artistic" (from Latin "artisticus", meaning relating to art) and the suffix "-ally" (meaning in a manner). The word describes doing something in a manner that is not artistic or lacking in artistic quality.
Think of 'not' ('in-') doing something 'artistic' — that's why inartistically means lacking artistic quality.