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Unless

/ʌnˈles/

Used to introduce a condition in which something will not happen or be true except if the condition is met.

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This word has no synonyms

'Unless we kill her,' said Raymond.

She was all alone, unless he came to her now.

Of course, unless you have some special reasons to..."

Middle English unlesse, from on lesse that meaning on less condition that; evolved into its present form in the late 16th century.

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