circumcise 环割(circum+cise切→环切)
circumference 周长(circum+fer带来→ence→带来一圈→周长)
circumnavigate 环航世界(circum+navigate航行)
circumscribe 限制(circum+scribe写→规定范围→限制)
circumspect 小心谨慎的(circum+stance站→站在周围→环境)
circumvent 回避(circum+vent走→绕圈走→回避)