different between deadly vs harmful

English

Etymology

From Middle English dedly, dedlych, dedlich, from Old English d?adl?? (adjective); corresponding to dead +? -ly. Cognate with Dutch dodelijk, German tödlich.

The adverb is from Middle English dedliche, from Old English d?adl??e (adverb), from the adjective.

Pronunciation

• IPA^(key): /?d?d.li/

Adjective

deadly (comparative deadlier or more deadly, superlative deadliest or most deadly)

1. (obsolete, rare) Subject to death; mortal.
2. Causing death; lethal.
3. Aiming or willing to destroy; implacable; desperately hostile.
4. Very accurate (of aiming with a bow, firearm, etc.).
5. (informal) Very boring.
6. (informal) Excellent, awesome, cool.

Usage notes

In Australia, the sense "excellent, awesome, cool" is especially used by, or in connection with, Indigenous Australians.

Derived terms

• deadliness
• deadly sin

Translations

Adverb

deadly (comparative more deadly, superlative most deadly)

1. (obsolete) Fatally, mortally.
2. In a way which suggests death.

3. Extremely, incredibly.

Usage notes

Some adjectives commonly collocating with deadly: serious, clever, good

Derived terms

• fail-deadly

Translations

Related terms

• dead

English

Alternative forms

• harmfull (archaic)

Etymology

From Middle English harmful, from Old English *hearmful (suggested by hearmfull?? (“harmful; hurtful”)), equivalent to harm +? -ful.

Cognate with German harmvoll, Danish harmfuld, Swedish harmfull.

Pronunciation

• (General American) IPA^(key): /?h??mfl?/
• (Received Pronunciation) IPA^(key): /?h??mfl?/

Adjective

harmful (comparative harmfuller or more harmful, superlative harmfullest or most harmful)

1. of a kind likely to be damaging; injurious

   Wear a hat to protect your skin from harmful sunlight.

Usage notes

• Nouns to which "harmful" is often applied: effect, consequence, impact, influence, emission, chemical, ingredient, substance, gas, agent, additive, drug, radiation, dust, organism, plant, animal, insect, action, act, behavior, component, content, activity, interference, use.

Synonyms

• injurious; see also Thesaurus:harmful

Antonyms

• beneficial
• harmless

Translations

See also

• harm