safeguard [ˈseɪfgɑ:d]

以下由轻松背单词网站提供

vt.保护，维护；n.预防措施，保证条款

to protect something from harm

Keeping clean is a safeguard against disease. 保持清洁是抵御疾病的防护措施。
We must safeguard forest timber. 我们必须保护森林。