Guarded
来自Big Physics
late Middle English (in the sense ‘care, custody’): from Old French garde (noun), garder (verb), of West Germanic origin. Compare with ward.
etymonline
guarded (adj.)
1560, "protected, defended," past-participle adjective from guard (v.). Meaning "reserved and cautious in speech, behavior, etc." is from 1728. Related: Guardedly; guardedness.
