arsenotherapy

Etymology tree
Proto-Indo-European *ǵʰelh₃-
Proto-Indo-European *ǵʰl̥h₃enyomder.
Proto-Indo-Iranian *ȷ́ʰr̥Hanyam
Proto-Iranian *jr̥Hanyam
Old Median *zaranyam
Old Median *kā
Old Median *zaraniyakāder.
Middle Persian *zarnīkbor.
Classical Syriac ܙܪܢܝܟܐ (zarnīḵā)der.
Arabic الزَرْنِيخ (az-zarnīḵ)bor.
Byzantine Greek ἀρσενικόν (arsenikón)der.
Latin arsenicumder.
Middle French arsenicbor.
Middle English arsenik
English arsenic
Ancient Greek -ο- (-o-)der.
Latin -o-bor.
English -o-
English arseno-
Proto-Indo-European *treb-der.?
Ancient Greek θερᾰ́πων (therắpōn)
Ancient Greek -εύς (-eús)
Ancient Greek -εύω (-eúō)
Ancient Greek θεραπεύω (therapeúō)
Proto-Indo-European *-h₂
Proto-Indo-European *-éh₂
Proto-Indo-European *-i-eh₂
Proto-Hellenic *-íā
Ancient Greek -ία (-ía)
Ancient Greek θεραπεία (therapeía)bor.
New Latin therapīabor.
English therapy
English arsenotherapy
From arseno- + therapy.