poisonous
adjective
See more 3-syllable adjectives

Divide poisonous into syllables:

poi · so · nous

How to pronounce poisonous:

Definition of poisonous:

poisonous (adjective):
not safe to eat.
of or like a poison
destructive, harmful

Synonyms for poisonous:

baneful
deadly
fatal
harmful
inedible
lethal
mephitic
mortal
noxious
poison
poisoned
toxic
venomous
virulent

Antonyms for poisonous:

advantageous
aiding
anodyne
assisting
auspicious
beneficial
benevolent
benign
bland
favorable
favourable
friendly
gentle
good
guiltless
harmless
healthy
helpful
helping
hurtless
innocent
innocuous
innoxious
inoffensive
kind
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