Answer: stagnant

AnswerCrossword Clue
STAGNANTNot flowing.
stagnantinactive
stagnantnot flowing; foul; stale
stagnantstill and often foul water
STAGNANTCovered with pond scum, perhaps
STAGNANTLike backwater
STAGNANTNot moving
STAGNANTNot fresh, as water
STAGNANTMotionless
STAGNANTLike some ponds
STAGNANTNot running
STAGNANTInactive.
STAGNANTLacking in activity, interest, etc.
STAGNANTDull.
STAGNANTNot running or flowing.
STAGNANTMoribund
STAGNANTStill
STAGNANTInactive
STAGNANTNot progressing