toxic

word

/ˈtɑksɪk/
TAHK-sik
/tˈɒksɪk/
TOK-sik

Definition

Something that is poisonous and can harm living things. It is also used to describe harmful people, relationships, or environments.

Usage & Nuances

Often used in medical or scientific contexts for substances, but very common in everyday language to describe unhealthy behavior, attitudes, or relationships ('toxic friendship', 'toxic workplace'). Not slang, but strongly negative.

Example Sentences

Some chemicals can be very toxic to humans.

basic

The smoke from the fire was toxic.

basic

After years in a toxic workplace, she finally quit her job.

natural

He's always negative and brings everybody down — honestly, he's just toxic.

natural

Stay away from people who make you feel bad — life’s too short for toxic relationships.

natural

That plant is toxic if you eat it.

basic