垢 - dirt, grime, earwax

dirt; filth; grime

fur; incrustation; limescale

scale (i.e. hard water coating in a kettle, etc.); fur

cold-water ablutions

refinement; style; sophistication

pure and innocent; immaculate

smegma

female assistant who scrubbed customers at public baths and also offered sexual services (Edo period)

anonymous account (on social media; used alongside one's main account); secret account

private account (on social media, esp. Twitter); account that can only be viewed by approved followers

main account (on social media, etc.); principal account; real-name account

account ban