УЗЕЛ _|_ KNOT / UZEL [ˈuzʲɪɫ]          

Hint with an alternative definition: a looping of a piece of string or of any other long, flexible material, so it is an object full of ties, all-noose, used to link lashers, laces or cords.

Hints with translation + consonant words (by sounds or letters): the knot is like a puzzle you have to loosen, or it is like a secure round maze with a single exit.

Russian pro-tip: узел (на верёвке) | лезу (по верёвке)

Mental visualization: Уз (knot with a bow) + еЛ (knot with free end)