ELI5 mode
A mechanical or electronic fastening device designed to secure doors, gates, cabinets, or mechanisms against unwanted access, usually released by a matching key, code, or biometric scan. As a verb, it means to fasten with such a device or to fix something rigidly in position, like interlocking gears or hands clasped tight. In modern lingo, it pops up in tech for data synchronization or in sports for a grappling hold.
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