IPA: //ˈkruːzər//
KK: /ˈkruːzər/
A type of boat or ship designed for cruising, often equipped for living on board, or a fast warship with a long range.
The family rented a cruiser for their vacation on the lake.
Cruiser is formed from "cruise" (from Middle Dutch "cruysen", meaning to push or row) and the suffix "-er" (meaning a person who). A cruiser is a person or vehicle that pushes or travels along a route, often leisurely.
Think of someone who is 'pushing' or 'traveling' along a route — that's what a cruiser does.