undrinkable
Unsafe to swallow
Undrinkable describes a liquid that cannot or should not be drunk—whether because it's contaminated, tastes terrible, or is otherwise unsuitable for consumption: The tap water here is undrinkable.
The word usually applies to beverages that fail their purpose: The coffee sat so long it became undrinkable.
Capable of causing death
- lethalCausing or capable of death
- deadlyAble to cause expiration
- hazardousLikely to cause injury
- noxiousHarmful, especially when inhaled
carcinogenic · radioactive · corrosive · caustic · harmful · venomous · dangerous · pathogenic
Unsafe to drink
- pollutedMade impure by contaminants
- impureNot wholly clean
- unsanitaryLacking proper cleanliness
- taintedContaminated, made impure
unsafe · sewage · industrial · chemical · effluent · runoff · pesticides · hazardous
No longer fresh
- sourSharp, biting taste
- flatLacking vertical variation
- rancidDecomposed fat's quality
- curdledSolidified into lumps
fermented · putrid · rotten · off · expired · turned · moldy · musty
Infused too long
- unsweetenedContains no sweetener
- harshUnpleasantly severe or rough
- astringentTissue-contracting agent
- tannicHaving bark-derived acids
acrid · unpalatable · brackish · briny · alkaline · metallic · soapy · rancid
poisonous
Capable of causing death
noxious · carcinogenic · radioactive · corrosive · caustic · harmful · venomous · dangerous · pathogenic · antifreeze
nonpotable
Unsafe to drink
- pollutedMade impure by contaminants
- impureNot wholly clean
- unsanitaryLacking proper cleanliness
tainted · unsafe · sewage · industrial · chemical · effluent · runoff · pesticides · hazardous · arsenic
stale
No longer fresh
curdled · fermented · putrid · rotten · off · expired · turned · moldy · musty · foul
oversteeped
Infused too long
- unsweetenedContains no sweetener
- harshUnpleasantly severe or rough
- astringentTissue-contracting agent
tannic · acrid · unpalatable · brackish · briny · alkaline · metallic · soapy · rancid · curdled
murky
Dark and unclear
scummy · brackish · standing · pooled · fetid · green · slimy · foul-smelling · putrid · stale