commit 
英 [kəˈmɪt]  美 [kəˈmɪt] 
v. 犯罪；使…承担义务；承诺；把…托付给；拨出；指派…作战；自杀

例句：
This is a man who has committed murder. 

这个男子是一名杀人犯。

He has committed a criminal offence. 

他犯罪了。

I have never committed any crime. 

我从未犯过罪。

I'd like a friendship that might lead to something deeper, but I wouldn't want to commit myself too soon. 

我希望拥有一份能进一步发展的友谊，但又不想太快作出承诺。

They refuse to commit, refuse to settle down. 

他们拒绝作出承诺，拒绝安定下来。

I refuse to commit to a relationship. 

我不想专注于一段感情。