IPA: /tɛsˈtoʊstərˌoʊn/
KK: /tɛsˈtoʊstərˌoʊn/
A hormone produced mainly in the male reproductive organs that helps develop and maintain male physical traits, such as muscle and body hair. It can also be made artificially for medical purposes.
Testosterone levels can affect a man's energy and mood.
Testosterone → It is formed from "testis" (from Latin, meaning testicle) and the suffix "-one" (used in chemistry to denote a ketone or steroid). The word refers to a steroid hormone produced in the testicles, playing a key role in male development and characteristics.
Think of 'testis' which relates to the male reproductive organ, and remember that 'testosterone' is the hormone associated with male traits.
No commonly confused words.