VERB
向…保证；使…确信；使…放心
If you assure someone that something is true or will happen, you tell them that it is definitely true or will definitely happen, often in order to make them less worried.
例句
He hastened to assure me that there was nothing traumatic to report...
他忙不迭地向我保证，并没有什么悲惨的事要诉说。
'Are you sure the raft is safe?' she asked anxiously. 'Couldn't be safer,' Max assured her confidently...
“你确定木筏安全吗？”她不安地问道。“再安全不过了，”马克斯信心十足地向她保证道。