achieve
/ə-ˈchēv/
verb
to succeed at reaching or accomplishing (a goal, result, etc.) especially through effort
to reach or bring about a desired end or goal : to become successful
achieved fame
perform execute discharge accomplish achieve effect fulfill mean to carry out or into effect. perform implies action that follows established patterns or procedures or fulfills agreed-upon requirements and often connotes special skill. execute stresses the carrying out of what exists in plan or in intent.
idiom
to agree about something
After a long discussion they finally achieved/reached an understanding.