If you guard against something, you are careful to prevent it from happening, or to avoid being affected by it.
The armed forces were on high alert to guard against any retaliation.
PHRASAL VERB : V P n
If you guard against something, you are careful to prevent it from happening, or to avoid being affected by it.
The armed forces were on high alert to guard against any retaliation.
PHRASAL VERB : V P n
Collins COBUILD Advanced Learner's English Dictionary. Английский словарь Коллинз COBUILD для изучающих язык на продвинутом уровне. 2006