IPA: /ˈɡʌnˌboʊt/
KK: /ˈɡʌnˌboʊt/
A small boat that is equipped with weapons and used for military purposes.
The navy deployed a gunboat to patrol the coastal waters.
Gunboat → The word is formed from "gun" (from Old English "gonne", meaning a type of firearm) and "boat" (from Old English "bat", meaning a small vessel). A gunboat is a small vessel equipped with guns, used for military purposes.
Think of a small 'vessel' ('boat') that is equipped with 'firearms' ('gun') — that's what a gunboat is.