What is the origin of 'sleep tight'?

Read moreOne of the mysteries of the English language finally explained.

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Find an answer to, explanation for, or means of effectively dealing with (a problem or mystery)

*‘the policy could solve the town's housing crisis’**‘a murder investigation that has never been solved’*-
*‘At the same time this policy solves their problems in re-entering the workforce.’* -
*‘Narrative in each religion solves that problem for its respective adherents.’* -
*‘Let's try to unify the American people and govern in a way that solves problems.’* -
*‘Occasionally, someone has a simple idea that solves a huge problem.’* -
*‘I finally solved the mystery of my grandfather having two graves, and visited both of them.’* -
*‘First are solving the immediate problem by bringing in drivers from elsewhere in Yorkshire.’* -
*‘I need to watch the ‘extras’ to see if there are any clues to solving the mystery of it all.’* -
*‘They are a great partner, we are happy together, we will solve the problem together.’* -
*‘He is hoping to work with others such as the town council to try to solve the problem in various ways.’* -
*‘His financial problems were solved, but he was spurned by the art establishment.’* -
*‘And then when she solves the mystery, they cut back to her revealing it to the interested parties, a father and son.’* -
*‘It solves the problem of trying to hide away messy cables and unsightly stereos.’* -
*‘You can remove and clean the sensor and that usually solves the problem.’* -
*‘So you are not actually solving the problem by giving it to somebody else.’* -
*‘They take the bags away so the rats don't have their food supply, but this is still not solving the problem.’* -
*‘Both believe the market solves all problems of efficiency and allocation.’* -
*‘Ours is a reproducible model, and others may end up reproducing it and solving other problems.’* -
*‘Now suppose that there were a single algorithm for solving all mathematical problems.’* -
*‘The first, essential step towards solving a problem is to admit that it exists.’* -
*‘Give a specific example of a time when you used good judgment and logic in solving a problem.’*

View synonyms**find an answer to**, find the answer to, find a solution to, find the solution to, answer, resolve, work out, puzzle out, fathom, find the key to, decipher, decode, break, clear up, interpret, translate, straighten out, get to the bottom of, make head or tail of, unravel, disentangle, untangle, unfold, piece together, explain, expound, elucidate-

Late Middle English (in the sense ‘loosen, dissolve, untie’): from Latin solvere ‘loosen, unfasten’.