The word 'viewfinder' is a transparent compound from the 19th century, created to name a new technological component of the camera. It logically combines 'view', relating to the act of seeing the scene, with 'find', indicating the device's function of locating and framing that scene. The agent suffix '-er' is attached to the verb 'find', creating a noun for the object that performs the action of 'finding the view'. Thus, the term's literal meaning, "a thing that finds the view," perfectly and directly describes its practical role in photography.

Structure: view + find + er - view (from Old French veue 'sight', from Latin vidēre 'to see') - find (from Old English findan 'to come upon, discover') - er (from Old English -ere, agent noun suffix indicating a person or thing that performs an action)