Where does “antidormant” come from?

antidormant (English) comes from English dormant, from Latin dormiēns, from Latin dormiō, from Proto-Italic dormiō, from Proto-Indo-European drem- — to run.

Ancestry of “antidormant”, step by step

antidormant traces back through two separate lines of ancestry.

via English dormant

StepLanguageWordMeaning
1EnglishdormantInactive, sleeping, asleep, suspended; In a...
2Latindormiēnssleeping
3Latindormiōto sleep
4Proto-Italicdormiōto sleep
5Proto-Indo-Europeandrem-to run

via English anti

StepLanguageWordMeaning
1EnglishantiOpposed to something; That has a torsion angle...
2Englishanti-Against, hostile to; Contrasting with the norm;...
3Ancient Greekἀντι-anti-, against; like, reminiscent of
4Ancient Greekᾰ̓ντῐ́opposite
Every word from Proto-Indo-European drem-