curbless

adjective2

1. •
   Without a curb (raised margin).

   • Both the long, angled wall and another, shorter wall in the curbless shower contain glass block windows that provide natural light... — 2008
2. •
   (figurative) Without restraint; uncurbed, unchecked.

   • His force was the preternatural activity of a strong imagination, which, curbless and uncontrolled, bore him whithersoever it would. — 1856