soured
adjective
[ ˈsaʊəd ]
• (of food) having been made sour.
• "serve with guacamole and soured cream"
• having become acrimonious or difficult.
• "the couple's soured relationship"
sour
verb
• make or become sour.
• "water soured with tamarind"
Origin:
Old English sūr, of Germanic origin; related to Dutch zuur and German sauer .