(chemistry) a chemical reaction

(chemistry) reduction / resolution of a problem / the return of something

(chemistry) reduce / resolve a problem / return something to someone

to show, to make apparent / to express, to put into words / to signify, to represent, to symbolize, to stand for

to express, to say in words, to put into words

opposition; disagreement; defiance

opposition

chemical reaction / reaction, response / feedback

to react chemically / to respond, to react / be responsive, be sensitive

chemistry (branch of natural science)