The 42-acre site is a picture of serious endeavour.

The Alexandropol investigation by its nature is seen as the most serious such endeavor.

Were he a younger man, he might very well have made some serious endeavors in her direction.

The exhibits are serious endeavors, and the students worked closely with mentors or teachers.

It's quite a serious endeavor to step into a ring.

This is a serious endeavor that could put even the finest climbers' lives at risk.

The decision was made to evolve from a joke band to a serious endeavor.

After 1964, show business ceased to interest him as a serious endeavor.

We are making them understand that in the arena of serious competitive endeavor, there is nothing quite like a little hate, mate.

As more letters followed, what began as a hobby became a serious endeavor.