He had to cancel some engagements because of tiredness.是什么意思？

He had to cancel some engagements because of tiredness.

他太累了，不得不取消一些约会。

he

pron. 他，它，一个人；n. 雄性动物；

例句
Logic had prevailed and he had abandoned the idea.
最终理智占了上风，他打消了那个念头。

had

v. 有（ have的过去式和过去分词 ），（亲属关系中）接受，拿，买到；

例句
He claimed that his parents had abandoned him...
他声称父母遗弃了他。

to

prep. 向，朝着，到，关于，属于；adv. 朝一个方向的，到某种状态，关闭；

例句
I suggest you leave it to an expert...
我建议你把它留给专家来解决。

cancel

vt. 取消，注销，抵消，偿还，〈数〉约去；vi. 抵消，中

例句
This provided a pretext for the authorities to cancel the elections...
这给当局取消此次选举提供了借口。

some

det. 一些，某个，部分，相当多的；pron. 一些，若干，（数量不确切时用）有些人；adv. 大约，有点，稍微；

例句
It's not a question of some abstract concept.
这不是某个抽象概念的问题。

engagements

n. 订婚( engagement的名词复数 )，婚约，约会，约定；

例句
His work schedule still includes speaking engagements and other public appearances.
他的工作日程表上还包括演讲安排和在其他公开场合的露面。

because

conj. 因为；

例句
5,000 people die every year because of accidents in the home...
每年有5,000人死于家中的意外事故。

of

prep. 关于，属于…的，由…制成；aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气]；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

tiredness

n. 疲劳，倦怠；

例句
Ignoring feelings of tiredness knocks our body clocks out of kilter...
忽视疲劳感会打乱我们的生物钟。