To unscramble the letters in 'confessarius,' one can follow these steps:
1. Start by creating shorter words from the given letters: 'for,' 'con,' 'ess,' 'ris,' 'sir,' 'use,' 'sea,' 'sue,' 'ion,' 'sine,' etc.
2. Combine these shorter words to form longer words: 'fors,' 'core,' 'rise,' 'sire,' 'sour,' 'curse,' 'serious,' etc.
3. Continue rearranging and experimenting with the letters until you find a meaningful word or phrase that fits the context.