undertaking
a very important and large-scale task
a project or task of great size
a large and important task or project
a task that is difficult and requires a lot of effort to succeed
a task that is not easy to do or understand
a task of immense size
a task that requires careful thought and is not to be taken lightly
an extremely large task or project
a very large and heavy or solid task
a task of great significance or value
a task with many different and connected parts
a task done by two or more people or groups working together
a task of significant size or importance
a task that is useful, important, or good enough to be a suitable reward for the money or time spent
a task or project related to commerce or business, intended to make a profit
a task involving the possibility of something bad happening
a task that costs a lot of money
a task of a very large amount, scale, or intensity
a risky or dangerous task
a task that involves a lot of money
a formal promise made in writing
a formal promise made to the public
a very large and significant project
a task of great size and historical importance
a very serious and formal promise
to make a formal promise to someone
to create or state a formal promise
to do what you promised to do