noun
1.
an added ingredient that alters the character of something
her love had a marring admixture of selfishness
Synonyms: adulterant, alloy, denaturant
Related Word: doctor, fortification, taint; accretion, addition; bit, dash, shade, smack, spice, tinge
2.
Synonyms: mixture , amalgam, amalgamation, commixture, composite, compound, immixture, intermixture, mix, mix-up