Where does “biotherapeutical” come from?

biotherapeutical (English) comes from English therapeutical, from English therapeutic, from New Latin therapeuticus, from Ancient Greek θεραπευτικός, from Ancient Greek θεραπευτής, from Ancient Greek -τής, from Ancient Greek πεῖρα, from Proto-Indo-European per- — passed , crossed.

Ancestry of “biotherapeutical”, step by step

biotherapeutical traces back through two separate lines of ancestry.

via English therapeutical

StepLanguageWordMeaning
1Englishtherapeuticaltherapeutic; Such an agent
2EnglishtherapeuticOf, or relating to therapy; Having a positive...
3New Latintherapeuticuscuring, healing
4Ancient Greekθεραπευτικόςattentive, helpful, obliging, curative
5Ancient GreekθεραπευτήςOne who waits upon another; attendant
6Ancient Greek-τήςAppended to verbs to form agent nouns
7Ancient Greekπεῖραtrial, experiment, attempt
8Proto-Indo-Europeanper-before, in front; first; to go through
9Proto-Indo-Europeanpr̥tóspassed , crossed

via English Bio

StepLanguageWordMeaning
1EnglishBioAbbreviation of biology
2EnglishbiologyThe study of all life or living matter; The...
3Ancient Greekβίοςlife
4Ancient GreekΓένεσιςGenesis. The title of the first book of the Bible and Pentateuch as in the Septuagint translation in Greek
5Proto-Hellenicgénetisorigin, source
6Proto-Indo-Europeanǵénh₁tisbirth, production
7Proto-Indo-Europeanǵenh₁-to produce, to beget, to give birth
Every word from Proto-Indo-European pr̥tósEvery word from Proto-Indo-European per-Every word from Ancient Greek -τής