chemical science, chemistry - the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions

ameliorate, improve, meliorate, amend, better - to make better; "The editor improved the manuscript with his changes"

distill, distil - undergo the process of distillation

rectify, refine - reduce to a fine, unmixed, or pure state; separate from extraneous matter or cleanse from impurities; "refine sugar"

purge - rid of impurities; "purge the water"; "purge your mind"

alter, change, modify - cause to change; make different; cause a transformation; "The advent of the automobile may have altered the growth pattern of the city"; "The discussion has changed my thinking about the issue"

spiritualise, spiritualize - purify from the corrupting influences of the world; "During his stay at the ashram he was spiritualized"

lustrate - purify by means of a ritual; also used in post-Communist countries to refer to the political cleansing of former officials

change - undergo a change; become different in essence; losing one's or its original nature; "She changed completely as she grew older"; "The weather changed last night"