1. (used especially of machinery) not protected by a shield

See also: unprotected

• unstuff
• unstylish
• unsuasible
• unsubdivided
• unsubduable
• unsubdued
• unsubmissive
• unsubscribe
• unsubstantial
• unsubstantialise
• unsubstantialize
• unsubstantiated
• unsubtle
• unsuccessful
• unsuccessful person
• unsuccessfully
• unsufferable
• unsugared
• unsuitability
• unsuitable
• unsuitableness
• unsuitably
• unsuited
• unsullied
• unsung