Sər-kəm-spays
Here's a breakdown:
* Sər: Like "sir" but with a short "e" sound
* kəm: Like "come"
* spays: Like "space"
It's important to note that "circumspice" is an archaic word, rarely used in modern English. If you're unsure how to pronounce it, it's always best to ask someone or look it up in a dictionary.