Synonyms of off (one's) guard in English:

off (one's) guard


See definition of off guard

phrase

1‘he was caught off guard when the man charged towards him’

SYNONYMS
unprepared, unready, inattentive, unwary, unwatchful, with one's defences down, by surprise, cold, unsuspecting
informal napping, asleep on the job, asleep at the wheel, on the hop
ANTONYMS

prepared