Where does “deadliness” come from?

deadliness (English) comes from English deadly, from English -ness, from Middle English -nesse, from Old English -nes, from Proto-West Germanic -nassī, from Proto-Germanic -inassuz, from Proto-West Germanic -ī, from Proto-Germanic -į̄ — Creates collective nouns, which refer to groups...

deadliness (English): The degree to which a thing is deadly; The...

Definitions

  1. The degree to which a thing is deadly; The...

Ancestry of “deadliness”, step by step

deadliness traces back through two separate lines of ancestry.

via English deadly

StepLanguageWordMeaning
1EnglishdeadlySubject to death; mortal; Causing death; lethal;...
2English-nessAppended to adjectives to form nouns meaning "the...
3Middle English-nesseAffixed to adjectives to form abstract nouns...
4Old English-nesUsed to form abstract nouns, usually from...
5Proto-West Germanic-nassīUsed to form abstract nouns, usually from...
6Proto-Germanic-inassuz-ness
7Proto-West Germanic-ness, -th
8Proto-Germanic-į̄-th
9Proto-Indo-European-íh₂
10Proto-Indo-European-h₂Creates collective nouns, which refer to groups...

via Middle English dedlinesse

StepLanguageWordMeaning
1Middle Englishdedlinesse
2Old Englishdēadlīcnesmortality
Every word from Proto-Indo-European -h₂