It was a hazardous undertaking: everyone thought of the nitrogen mustards as dangerous compounds which could destroy vital cells in many organs.

Casting anchor, we waded ashore to rest up for a day before continuing the outward hazardous undertaking.

Because this is an extremely hazardous undertaking.

He gave Angela's boy high marks for courage; it was a hazardous undertaking at seventeen.

It was a shaky start to what could be one of the more hazardous undertakings by shuttle astronauts.

This is a hazardous undertaking in tropical seas because of the sharp coral, which almost comes alive in its search for human feet.

Flying over the Hump proved to be an extremely hazardous undertaking for Allied flight crews.

"Manufacturing drugs, especially methamphetamine, seems to be a very hazardous undertaking, best left to you and the Mexicans."

Myers nodded, chewing carefully' with as few natural teeth as he had left, even fresh corn dodgers were a hazardous undertaking.

The voyage from Europe was a hazardous undertaking, with fairly poor odds on returning at all, let alone with a holdful of spice.