People often leave the apostrophe out of “won’t,” meaning “will not.” “Wont” is a completely different and rarely used word meaning “habitual custom.” Perhaps people are reluctant to believe this is a contraction because it doesn’t make obvious sense like “cannot” being contracted to “can’t.” The Oxford English Dictionary suggests that “won’t” is a contraction of a nonstandard form: “woll not.”
Quite a few confused folks substitute “want” for “wont,” leading to mangled expressions such as “such is my want.”
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