the word stroller originates from the verb 'stroll', which entered english in the early 17th century from the dutch word strollen, meaning to wander or tramp. the agent suffix '-er', of old english origin, was added to create a noun denoting 'one who strolls'. the modern primary meaning, referring to a baby carriage, emerged in american english during the 20th century through a logical semantic shift: the vehicle is designed for a relaxed, leisurely walk, thus it is a thing that facilitates or is used for a stroll.

Structure: stroll (walk leisurely) + er (one who does) stroll (from Dutch strollen, meaning to wander, to tramp; functions as the verb root). er (from Old English -ere, an agent noun suffix indicating a person or thing that performs an action).