- Profound transformation.
Etymology: Coined in w:Shakespeare, Shakespeare's s:The Tempest, The Tempest: "Full fathom five thy father lies: / Of his bones are coral made: / Those are pearls that were his eyes: / Nothing of him that doth fade / But doth suffer a sea-change / Into something rich and strange."<ref>http://www.worldwidewords.org/qa/qa-sea1.htm "Sea change" (World Wide Words)</ref>
- French: changement en profondeur
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