cave
noun
a hollow in the earth, especially one opening more or less horizontally into a hill, mountain, etc.
Used to describe an action that began in the past, has continued continuously, and is still in progress.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
L/Cpl Roe, from Scotland, who is in the Royal Electrical Mechanical Engineers, attached to 21 Signal Regiment, has been caving for more than eight years and cave diving since 2012.
From BBC ● Dec. 28, 2018