Valued something highly and kept it safe or cared for it deeply, treating it as precious or important.
From Old French 'tresor' (treasure), which came from Greek 'thesauros' (a storage place or treasure house). The word evolved from 'valuable objects' to 'things we value deeply.'
The word 'treasure' connects to 'thesaurus' (a book of word synonyms) because both come from Greek 'thesauros'—a thesaurus is literally a 'treasure house of words'!
Complete word intelligence in one call. Free tier — 50 lookups/day.