thesaurus | Etymology of thesaurus by etymonline
https://www.etymonline.com/word/thesaurus
WEBMar 20, 2024 · thesaurus. (n.) 1823, "treasury, storehouse," from Latin thesaurus "treasury, a hoard, a treasure, something laid up," figuratively "repository, collection," from Greek thēsauros "a treasure, treasury, storehouse, chest," related to tithenai "to put, to place." According to Watkins, it is from a reduplicated form of PIE root *dhe- "to set, put ...
DA: 91 PA: 64 MOZ Rank: 43