v give surety or assume responsibility
v make certain of
v promise to do or accomplish
v stand behind and guarantee the quality, accuracy, or condition of
a. 有保证的, ；有人担保的
1. The product comes with a guaranteed warranty for two years.
该产品提供两年的保证保修。
2. I can assure you that your satisfaction is guaranteed.
我可以保证您的满意是有保障的。
3. The hotel guarantees a clean room upon your arrival.
酒店保证您到达时房间是干净的。