Oarlock (noun)

A device or mechanism on a boat that holds an oar in place while rowing.

Origin:

A combination of the word "oar" and "lock" refers to the mechanism that holds the oar in place while rowing.

Examples:

1. The oarlock on my rowboat broke and now I can't row.
2. Make sure the oarlocks are securely fastened before you go out on the water.
3. The oarlock allows the rower to exert more power and control.
4. The oarlock is a crucial part of the rowing system.
5. Some boats have sliding oarlocks, while others have fixed oarlocks.