interlock
UK: ˌɪn.təˈlɒk | US: ˌɪn.t̬ɚˈlɑːk
vt. to connect or fasten (parts) together so that they engage with each other
vi. to become connected or engaged in this way
n. a device or mechanism that interlocks
The word "interlock" combines the prefix "inter-" (from Latin inter, meaning "between" or "among") and the root "lock" (from Old English loc, meaning "fasten" or "secure"). The term emerged in the 17th century to describe mechanisms or systems where components fit together tightly, ensuring mutual engagement. This reflects the logical progression from physical locking (e.g., gears) to abstract systems (e.g., safety protocols).
The gears interlock perfectly to transfer motion smoothly.
The puzzle pieces interlock to form a complete image.
Safety systems interlock to prevent accidental operation.
Their fingers interlocked as they walked.
The interlock mechanism ensures the door cannot open while the machine is running.