Answer: retardant

AnswerCrossword Clue
RETARDANTGrowth inhibitor
RETARDANTDelaying
RETARDANTTending to delay
RETARDANTSuppressor
RETARDANTInhibitor
RETARDANTAny agent that delays or hinders
RETARDANTDelaying agent
retardantany substance capable of reducing the speed of a given reaction
retardantretarding or tending to retard (usually used in combination)
retardantsomething that retards eg the spread of fire