IPA: /sɜːr.kəmˈfɛr.ən.ʃəl/
KK: /sɜrˌkʌmˈfɛrənʃəl/
Relating to the outer boundary or edge of a circle or round shape.
The circumferential road around the city helps to reduce traffic congestion in the center.
Circumferential is formed from "circum-" (meaning around) and "ferre" (meaning to carry). The word describes something that carries or relates to the area around a circle or circumference.
Think of 'around' ('circum-') and 'carrying' ('ferre') to remember that circumferential refers to something that relates to the area surrounding a circle.
No commonly confused words.