Commitment

发音：[kəˈmitmənt]

例句：

If someone makes a commitment, that person agrees or pledges to do something in the future.
When you take a job, you are making a commitment to show up and do the job well, and your employer makes a commitment to pay you.
Nancy is renowned for her commitment to high-quality journalism, her excellent leadership skills, and her passion for innovation.
The discussion reflected a commitment to combating misinformation, hate speech, and toxic ideas.
This year, they made a commitment to delivering clean water and sanitation to 100 million people in need.
In a memoir, Obama wrote that “probably the single best piece of news” he received at the London summit was China’s commitment to a major economic stimulus package.

解释：

Commitment这个单词为名词(对应的动词为commit), 表示“an agreement or pledge to do something in the future”这一含义，即“承诺/保证/许诺”, 与promise/pledge/guarantee这些单词构成近义词。
该单词可以用来表示“a commitment to sb/sth：向某人或者某事做出承诺。” 当然，这样的承诺可大可小。当我们把这个单词用在婚姻关系时，其代表的承诺很大、很慎重，使用场景如下：At last night dinner, Jack made a commitment to his girlfriend to marry her in 2023.（Jack向他女朋友承诺会在2023年娶她。）/At last night dinner, Jack committed （采用动词形式） to marrying his girlfriend in 2023.
除了婚姻关系外，commitment还可以用于其它场合表示一些慎重的承诺，使用场景如下：The soldier showed a deep and unwavering commitment to protecting and defending his motherland. (士兵承诺会保护及捍卫自己的祖国。）/It has led to an angry response from officials in Beijing, who have accused the U.S. of violating its long-standing commitment to abide by its One China policy.（这引起了北京官员的愤怒回应，他们指责美国违反了其遵守一个中国政策的长期承诺。）
最后，除了表示重要的承诺之外，commitment也可以用来表示一些“小的”承诺，例如：When we promise to show up at a party on time, we must be punctual because that is a commitment to others. (当我们答应别人按时出席聚会时，最好准时参加，因为那是一种对别人的承诺。）