n.

1. 保证[U][+（that）]
2. 表示保证（或鼓励等）的话[C][+（that）]
   The contractor gave assurances that the work would be completed on time.

   承包人表示过保证按时完工。

3. 把握，信心[U][+（that）]
   They answered with assurance that it was against the rules.

   他们很有把握地回答说那是违反规定的。

4. 对自己才能的信心，自信[U]
   The teacher lacked assurance in front of his class.

   那位教师在学生面前缺乏自信。

5. 厚颜无耻[U][the S][+to-v]
   He had the assurance to ask me for money.

   他竟厚着脸皮向我要钱。

6. 【英】（人寿）保险[U]

n.

1. a positive declaration intended to give confidence.
2. confidence in one's own abilities.
   ▸certainty.
3. chiefly Brit. life insurance.