pyritiferous

Etymology tree
Proto-Indo-European *péh₂wr̥
Proto-Hellenic *pāwər
Ancient Greek πῦρ (pûr)
Proto-Indo-European *-tósder.
Ancient Greek -της (-tēs)der.
Ancient Greek -ῑ́της (-ī́tēs)
Ancient Greek πῠρῑ́της (pŭrī́tēs)bor.
Latin pȳritēsder.
Old French pyriteder.
English pyrite
Latin -i-bor.
English -i-
Proto-Indo-European *bʰer-
Proto-Indo-European *bʰéreti
Proto-Italic *ferō
Latin ferō
Proto-Indo-European *h₃ed-
Proto-Indo-European *-os
Proto-Indo-European *h₃édosder.?
Proto-Italic *-ōtsos or *-otsos
Latin -ōsus
Old French -usbor.
Middle English -ous
English -ous
English -ferous
English pyritiferous
From pyrite + -i- + -ferous.