| Subject | English | Russian |
| fig. | blur the line | стирать грань (... enhanced by the classic vein-cut travertine tiles that cover the main floor, including the patios, blurring the line between inside and outside. ART Vancouver) |
| gen. | blur the line between | размывать грань между (Taras) |
| math. | blurred line | размытая линия (на чертеже) |
| mech.eng., obs. | blurred line | смазанная линия |
| mech.eng., obs. | blurred line | неясная линия |
| gen. | blurred line | размытая граница (Ремедиос_П) |
| fig. | line is blurred | граница размыта (между понятиями, видами поведения, реальностью и сном и пр. • Certain places on Earth are particularly conducive to paranormal or unusual activity, he said, offering places like Brazil and West Africa as examples. The line between the physical and the spiritual worlds in such societies is typically blurred, which may cause incidences of phenomena like telekinesis, UFOs, cryptozoology, and near-death experiences to concentrate there.  coasttocoastam.com ART Vancouver) |
| gen. | the line between something and something is blurred | граница между чем-либо и чем-либо размыта (Technical) |