dregs
definition
the remnants of a liquid left in a container, often undesirable solid substances that settle at the bottom
example
After finishing my coffee, I noticed the bitter dregs at the bottom of the cup that I couldn't bring myself to drink.
synonyms
residueremnantssediment
word origin — The word 'dregs' comes from the Middle English 'dregges', derived from Old Norse 'dreggr', which means 'sediment' or 'lees'.