The spelling of the word "lock gate" may seem straightforward, but the pronunciation can be a bit tricky. The IPA phonetic transcription for this word is /lɒk geɪt/. The first syllable, "lock," rhymes with "sock" and refers to a device for securing a door or container. The second syllable, "gate," rhymes with "late" and refers to a movable barrier used to control water flow. Together, "lock gate" refers to the combination of these two structures often found in waterways and canals.
A lock gate refers to a mechanical structure designed to control the flow of water in a canal or a waterway by providing a barrier that can be opened or closed. It is typically situated at the entrance or exit of a lock, a chamber used for raising or lowering vessels between different water levels.
A lock gate usually consists of two large, sturdy doors that swing or slide on hinges, which are often made of steel or wood, placed perpendicular to the waterway's course. These gates can be closed to retain or release a specific water level, allowing boats or ships to pass through the lock safely. The gates are strategically placed to ensure that the pressure of the water is distributed evenly and can withstand the force exerted through the difference in water levels.
When a vessel approaches a lock, the lock gate needs to be opened to enable entry or exit. Water is either let into the chamber to raise the vessel or drained out to lower it, and the gate is then closed to maintain the desired water level. The design and operation of the lock gates may vary based on the specific waterway and the size of the vessels it accommodates.
Overall, lock gates serve a vital purpose in managing water levels in canals and waterways, facilitating the safe passage of boats and ships between different elevations.
The word "lock gate" combines two separate etymologies.
The word "lock" has its origins in Old English, where it was spelled as "loc". It is derived from Proto-Germanic "lukan", meaning "to fasten" or "close". This term eventually evolved into "lock" which refers to a device used for securing or fastening.
The term "gate" comes from Old English too, from "geat", which means "door" or "opening". It can be traced back to the Proto-Germanic word "gatą", meaning "hole" or "opening". Eventually, "geat" evolved into "gate" specifically referring to a barrier that can be opened or closed to allow passage or control access.