The winning of heathen souls was proving to be a costly endeavor.
Despite this win, the fact remains that breeding giant pandas is a challenging and costly endeavor.
"But it's very obvious to me that this is going to be a prolonged and costly endeavor."
Might it rather be a panacea for the more costly endeavor of upgrading passenger screening?
The parochial schools do not provide special education, a costly endeavor.
In any event, naming is a costly endeavor.
A costly endeavor, that- but then, spies were in the business of being difficult to identify.
Historic restoration, they point out, is a costly endeavor, something that many elected officials failed to appreciate.
In addition, a transcontinental railroad would become a very costly endeavor.
To do so, it will have to come up with a regulatory scheme, among other costly endeavors.