underreaming
undersaturated
undersea
undersealing
under-secretary
undersize
undersurface
underthrust
undertighten
undertonging
  underwater
underwent
underwriter
undesired
undetected
undeterminable
undeveloped
undirected
undiscovered
undissolved
undistorted

    underwater scour prevention device

    устройство для предотвращения загрязнения подводной среды