Experts at Penn State University have a simple answer: When the undesirable qualities outweigh the good qualities.

VOA: special.2010.08.10

Experts at Penn State University have a simple answer: When its undesirable qualities outweigh its good qualities.

VOA: special.2009.05.26

The same dictionary also says another former definition of eighty-six was undesirable customer.

VOA: special.2010.01.08

It is catastrophic to the natural ecosystem, and a problem for the fishing industry in the U.S., which looks at Asian Carp as an undesirable fish to eat.

VOA: standard.2010.07.20

Senior Police Superintendent Vishnu Naidoo says security preparations for next year's World Cup are even more extensive and include steps to prevent undesirable foreign elements from disrupting the event.

VOA: standard.2009.06.12