cir·cum·val·late 
(sûr′kəm-vălāt′)
(sûr′kəm-vălāt′)tr.v. cir·cum·val·lat·ed, cir·cum·val·lat·ing, cir·cum·val·lates
To surround with or as if with a rampart.
adj.
1. (also -ĭt) Surrounded with or as if with a rampart.
2. Anatomy Surrounded by a ridge or raised, wall-like structure.
[Latin circumvallāre, circumvallāt- : circum-, circum- + vallum, rampart with palisades (from vallus, post, stake).]
cir′cum·val·lation n.
- straggler
- straggly
- straight
- straight-ahead
- straight and narrow
- straight angle
- straight-arm
- straight arrow
- straight-arrow
- straightaway
- straight chain
- straightedge
- straightedged
- straighten
- straightener
- straighten out
- straight face
- straight-faced
- circumscriptive
- circumsolar
- circumspect
- circumspection
- circumspectly
- circumstance
- circumstantial