IPA: /ʌnˈsɜːrkəmˌsaɪzd/
KK: /ʌnˈsɜr.kəm.saɪzd/
Describing someone who has not undergone the surgical procedure to remove the foreskin from the penis.
He is uncircumcised, which is common in some cultures.
Uncircumcised → It is formed from "un-" (meaning not) and "circumcised" (from Latin "circumcidere", meaning to cut around). The word "uncircumcised" refers to someone who has not undergone the procedure of circumcision, meaning not cut around.
Think of 'not' ('un-') having been 'cut around' ('circumcised') — that's why uncircumcised means not having been circumcised.