circum-表示"环绕,周围"

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)