IPA: /ˈfrɒɡmən/
KK: /ˈfrɔgˌmæn/
A person who swims underwater using special equipment like a breathing mask and fins, often for military purposes or underwater tasks.
The frogman completed the underwater mission successfully.
Frogman → It is formed from "frog" (from Old English "frogg", meaning a tailless amphibian) and "man" (from Old English "mann", meaning a human being). The word "frogman" refers to a person, typically a diver, who is trained to operate underwater, often in military contexts, and is named for the amphibious nature of frogs.
Think of a 'frog' as an amphibian that can move in water and on land, combined with 'man' to remember that a frogman is a person who operates in water, much like a frog.