☠️ In a deadly way 🌶️ Extremely intensely

lethally

2 6.8

In a way that can cause death

adverb
/ˈliːθəli/

: letalmente

Should an ice crystal even brush against a fish at these temperatures, it can propagate across the skin and penetrate as lethally as a spear.
lethally radioactive
lethally dangerous

This went on for hours before they finally gave up and he was not lethally injected.

Examples

Its skin is lethally toxic and can cause full-body paralysis.

Dora and the Lost City of Gold (2019)
But it means that this whole section of Mioshi-Land will be lethally radioactive for thousands of years.

Fiction book (1999)
The reactor waste containing the plutonium is lethally radioactive.

Blog text (25)
These biologists determined that no life could survive the combination of ultraviolet solar radiation, extreme dryness, and lethally oxidizing compounds found on the Martian surface.

Academic text (2000)
The venom of the snake can lethally affect anyone who gets bitten.
He handled the chemicals lethally, unaware of the dangers they posed.
The treatment was lethally potent, requiring careful administration by trained professionals.

Synonyms

fatally

vslethally

33 5.8

In a way that causes death

is capable of causing death rather than always causing it

mortally

vslethally

13 7.1

In a way that can cause death or show very strong feeling

focuses only on causing death, not on strong emotions or intensity

Antonyms

harmlessly

8 2.3

In a way that does not hurt people or things

How Deadly

lethally

2 6.8

dangerously

97 3.2

riskily

6.4

safely

473 1.0

Surface Forms

lethally positive

Morphology

lethally = lethal (transparent) = lethal + ly

Regular adverbial formation from the adjective 'lethal' with a predictable meaning 'in a deadly way'.

Etymology

Lethally comes from lethal, which comes from an old Latin word letum meaning 'death', so to do something lethally is to do it in a 'deadly' way.