IPA: /ˌɑːrtɪˈfæktʃuəl/
KK: /ɑrˈtɪfæk.tʃu.əl/
Relating to or resembling an object made by humans, especially one of historical or cultural interest.
The museum displayed an artifactual representation of ancient tools used by early humans.
Artifactual → It is formed from "artifex" (from Latin, meaning craftsman or artist) and "-al" (meaning pertaining to). The word "artifactual" refers to something that pertains to or is characteristic of artifacts, which are objects made by humans, typically of historical or cultural interest.
Think of a 'craftsman' ('artifex') creating something 'pertaining to' ('-al') human history — that's why artifactual relates to artifacts.
No commonly confused words.