1. Not altered by reduction

See also: unaltered, unchanged

• run for
• run into
• run low
• run on
• run out
• run over
• run roughshod
• run short
• run-in
• run-of-the-mill
• run-of-the-mine
• run-on sentence
• run-resistant
• run-through
• run-time
• run-time error
• runabout
• runaway
• runaway robin
• runch
• runcible spoon
• runcinate
• runcinate leaf
• rundle
• rundown