IPA: /ˌoʊvərprəˈmoʊtɪŋ/
KK: /oʊvərprəˈmoʊtɪŋ/
Not applicable as 'overpromoting' is not an adjective; it is the present participle form of a verb.
The company is overpromoting its new product, which may lead to customer fatigue.
Overpromoting → It is formed from "over-" (meaning excessively) and "promoting" (from Latin "promovere", meaning to move forward or advance). The word "overpromoting" means excessively advancing or endorsing something.
Think of 'over' meaning excessively and 'promoting' meaning to advance something — so overpromoting means to excessively advance or endorse.
No commonly confused words.