v.t.及物動詞保修We guarantee this new car for 5 years
n. (c.)可數名詞(某產品的)保固There is a five year guarantee on this car, if anything breaks, they will fix it for free
v.t.及物動詞保證I guarantee that these bonds are risk-free or I will refund your money
n. (c.)可數名詞保證某事的如期完成Their guarantee makes me feel better about investing with them
v.t.及物動詞保證I guarantee to pay you next week
n. (c.)可數名詞擔保They demanded guarantees of political freedom.
v.t.及物動詞法律保障The bill of rights guarantees certain freedoms.