垢 - dirt, grime, earwax

dirt; filth; grime

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

multiple accounts (e.g. on social media)

shininess in clothing (from grime, wear, overuse, etc.)

cold-water ablutions (for spiritual purification)

purity; spotlessness

pure and innocent; immaculate

scrubbing grime off (the skin)

dirt under one's fingernails

to take a lesson from (someone serving as an example); to learn from someone's example; to boil the dirt under (someone's) fingernails and drink it

abandoned account (on social media, etc.); unused account; old account