adulterate

Definition

To mix or add something unhealthy, unpleasant, or degrading to something good, especially so that it becomes unsatisfactory or unpleasant in quality or effect, in character, or in spirit.

বাংলা কোনও ভালো বস্তুকে অসুস্থ, অসুবিধাজনক, বা অবমাননাকর কিছু মিশিয়ে দেওয়া

Example

"She refused to eat the store's adulterated milk, which was found to be past its fresh shelf life."