The story
- Proto-Indo-European*bʰil-
- Proto-Indo-European*bʰil-o-s
- Ancient Greekφῐ́λος (phĭ́los)
- Ancient Greekσοφός (sophós)
- Ancient Greekφῐλόσοφος (phĭlósophos)
- Ancient Greekφιλοσοφία (philosophía)
- Latinphilosophia
- Old Frenchphilosophie
- Middle Englishphilosophie
- Englishphilosophy
- English todayphilosophize
From philosophy + -ize.
Etymology from Wiktionary, CC BY-SA 4.0.