Answer: reacting

AnswerCrossword Clue
REACTINGResponding to a stimulus
REACTINGCombining chemically
REACTINGResponding (to)
reactingRespond or behave in a particular way in response to something
reactingCause (a substance) to undergo such a change by interacting with another substance
reacting(of a person) Suffer from adverse physiological effects after ingesting, breathing, or touching a substance
reactingREACT, to respond to a stimulus
reacting(of stock prices) Fall or rise in reaction to events, developments, etc
reactingRespond with hostility, opposition, or a contrary course of action to
reactingInteract and undergo a chemical or physical change