ADJ-GRADED
谨慎的；小心在意的；警惕的
If you describe someone as guarded, you mean that they are careful not to show their feelings or give away information.
例句
The boy gave him a guarded look...
那个男孩充满戒心地瞧了他一眼。
In the office, Dr. Lahey seemed less guarded, more relaxed.
莱希博士在办公室里看起来没有那么谨小慎微，放松了许多。