Where does “semilethal” come from?

semilethal (English) comes from English lethal, from Latin lētālis, from Latin -ālis, from Proto-Italic -ālis — forms relational adjectives.

semilethal (English): lethal to at least half of all affected organisms

Definitions

  1. lethal to at least half of all affected organisms

Ancestry of “semilethal”, step by step

semilethal traces back through two separate lines of ancestry.

via English lethal

StepLanguageWordMeaning
1EnglishlethalDeadly; mortal; fatal; Any weapon that causes...
2Latinlētālislethal, deadly, fatal, mortal
3Latin-ālis
4Proto-Italic-ālisforms relational adjectives

via English semi

StepLanguageWordMeaning
1EnglishsemiA semi-detached house; A semitrailer; a...
2Englishsemi-half; partial, incomplete; somewhat, rather,...
3Latinsēmi-half
4Proto-Indo-Europeansēmihalf; partially
Every word from Proto-Italic -ālisEvery word from Latin -ālisEvery word from Latin lētālis