Anagrams of: UNDERRUNNING

• lasting a long time

• patiently bearing continual wrongs or trouble

• continuing forever or indefinitely

• a smuggler of guns

• a program that is broadcast again

• broadcast again, as of a film

• rerun a performance of a play, for example

• run again for office

• cause to perform again

• a large sandwich made of a long crusty roll split lengthwise and filled with meats and cheese (and tomato and onion and lettuce and condiments); different names are used in different sections of the United States

• grinding tooth with a broad crown; located behind the premolars

• machinery that processes materials by grinding or crushing

• a machine tool that polishes metal

• horse of a dull brownish grey color

• a color or pigment varying around a light grey-brown color

• of a dull greyish brown to brownish grey color

• treat cruelly

• persistently ask for overdue payment

• cure by salting

• make a dun color

• To ensconce or hide oneself in (or as in) a den.

• resembling a sound of violent tearing as of something ripped apart or lightning splitting a tree

• not liable to error