Decocts is a term that means to extract the essence or flavor of a substance through boiling or simmering. Its antonyms would include terms like dilute, water down, or weaken. Instead of concentrating a substance, these terms suggest a process of dispersing, thinning out, or reducing its potency. Other antonyms for decocts might include terms like dissipate, evaporate, or vaporize, which imply the opposite process of condensation or thickening. Depending on the context, opposites to decocts could also include terms like enrich or fortify, which suggest adding or enhancing a substance rather than reducing it.