Pronunciation: /tʌtʃ ˈbɒtəm/
noun a part of a body of water or a surface that is deepest and furthest away from the surface
A1 I can touch the bottom of the pool when I swim.
A2 She was scared when she couldn't touch bottom while snorkeling.
B1 The diver carefully descended to touch bottom and explore the ocean floor.
B2 The submarine was able to touch bottom in the deepest part of the ocean.
C1 The researcher used a special device to touch bottom and collect samples from the seabed.
C2 The expedition team successfully touched bottom in the uncharted waters of the Mariana Trench.
verb to reach the bottom of a body of water or a surface
A1 The child touched the bottom of the pool with his feet.
A2 She was nervous about diving into the deep end of the pool, but she finally touched bottom and felt relieved.
B1 After hours of searching, the divers finally touched bottom and found the lost treasure.
B2 The submarine slowly descended into the ocean until it touched bottom at a depth of 500 meters.
C1 The experienced diver knew how to navigate the underwater cave without touching bottom.
C2 The deep-sea explorer's submersible touched bottom in the Mariana Trench, setting a new record for ocean exploration.
formal The diver carefully descended to touch bottom and collect samples from the ocean floor.
informal I had to swim all the way to the deep end of the pool just to touch bottom.
slang I can't believe how shallow this lake is - you can practically touch bottom everywhere.
figurative After weeks of struggling with the project, I finally feel like I am starting to touch bottom and make progress.
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