残ざん滓し

noun, noun which may take the genitive case particle 'no'

remains; dregs; vestiges; remnant; residue

Refers to what is left behind after something has been removed, filtered, or has passed; can be physical residue, dregs, or figurative remnants of a past era or system.

• コーヒーの残ざん滓しがカップの底そこにたまっていた。

  Coffee dregs had collected at the bottom of the cup.

• その制せい度どは封ほう建けん時じ代だいの残ざん滓しだと言いわれている。

  That system is said to be a vestige of the feudal era.