Phosphorus = Greek 'light-bearer' (phōs light + -phoros carrying). Two PIE roots: *bʰeh₂- (shine) and *bʰer- (carry). Originally the Morning Star; its exact Latin twin is Lucifer (lux + ferre). Brand named the glowing element after the star in 1669. Third in the *bʰer- cluster with referendum and semaphore. Opens *bʰeh₂- (shine) cluster connecting to photo-, phantom.
A highly reactive, luminescent chemical element (P, 15) that glows in the dark; historically, the Greek epithet for the Morning Star (Venus at dawn).
From Latin Phōsphorus, from Greek Φωσφόρος (Phōsphóros, "light-bringer, the morning star"), a compound of φῶς (phôs, genitive φωτός, "light") and -φόρος (-phóros, "bearing, carrying"), from φέρω (phérō, "to carry"). Φῶς derives from PIE *bʰeh₂- ("to shine, be bright"), a root that yields Sanskrit bhā- ("to shine"), bhās ("light"), and Old Irish bán ("white"). Φέρω comes from PIE *bʰer- ("to carry, bear"), yielding Latin ferre, English bear, Sanskrit bhárati, and Gothic bairan. The Greeks applied Φωσφόρος to the planet