Words beginning with H: a. Operated by the force of moving water: b. New Zealand mountain climber who, in 1953, became the first man to reach the top of Mt. Everest c. Arabic standing water pipe

The word "hydraulic" describes systems that operate by the force of moving liquids, typically water or oil. This term has ancient Greek roots, combining "hydor" meaning water, and "aulos" referring to a pipe or conduit. The principles of hydraulics allow for the transmission and amplification of force through pressurized fluids within a closed system, enabling heavy machinery to lift enormous loads, power brakes, and drive various mechanical components. Early applications of hydraulic principles can be seen in ancient irrigation systems and water clocks, showcasing humanity's long history of harnessing the power of liquids.

Sir Edmund Hillary, a New Zealand mountaineer, etched his name in history on May 29, 1953, when he, alongside Sherpa Tenzing Norgay, became the first climbers confirmed to have successfully reached the summit of Mount Everest. Their monumental achievement was part of the ninth British expedition to the world's highest peak. Following this historic ascent, Hillary dedicated much of his life to philanthropy, establishing the Himalayan Trust to support the Sherpa people of Nepal, building schools and hospitals in the region he had come to admire.

The hookah, also known as a shisha or waterpipe, is an Arabic standing water pipe used for smoking. Its origins are often traced to the Indian subcontinent in the 16th century, with an Iranian physician named Abul-Fath Gilani credited by some as its inventor, who sought a less harsh way to smoke tobacco. The device works by passing smoke through a water basin, which cools and filters it before inhalation. Beyond its function, the hookah holds significant cultural importance, particularly in the Middle East and South Asia, where it symbolizes hospitality, conviviality, and has long been a centerpiece of social gatherings in coffeehouses and homes.