commit/committed/commitment

commit /kəˈmit/ vt. 1.干(错事)，犯(罪)：commit an error 犯错误；commit many horrible crimes against… 对…犯下许多令人发指的罪行 2.把…交托给，把…押交，把…判处：commit a prisoner for trial 把犯人交付审判 He was committed to prison for contempt of court.他因蔑视法庭而被关进了监狱。

committed adj. 忠诚的，坚定的：a committed member of a political party忠诚的党员；remain committed to one’s youthful ideal坚持不懈地追求自己年轻时的理想The country was now irrevocably committed to war.这个国家现在义无返顾地投入了战争。

commitment /kəˈmitmənt/ n. 1.［u］信奉，献身: commitment to Buddhism 信奉佛教 2.［c］承担的义务: a treaty commitment 按条约所承担的义务 3.［c］承诺，许诺，保证: observe one’s commitments 履行自己的承诺；his lifelong commitment to the socialist cause他对社会主义事业的毕生支持The government avoided giving any commitments on pensions.政府避免就养老金问题作出任何承诺。［考句］By signing the lease we made a commitment to pay a rent of $150 a week.签了这个租约表示我们承诺每周要付150美元租金。