IPA: /ˈkaʊntərpɑːrt/
KK: /ˈkaʊntərˌpɑrt/
A person or thing that has the same function or characteristics as another, often used to refer to a corresponding person or thing in a different context.
The CEO met with her counterpart from the other company to discuss the merger.
Counterpart → It is formed from "counter-" (meaning opposite or against, derived from Old French *contre*) and "part" (from Latin *partem*, meaning part or portion). The word "counterpart" refers to something that corresponds to or has a similar function as another, often in an opposite or complementary way.
Think of something that is 'opposite' or 'against' ('counter-') another 'part' — that's why a counterpart is something that corresponds to another.
No commonly confused words.