The compound "start-up" is a modern formation from two deeply rooted Germanic elements. The verb "start" originates from the Old English styrtan, meaning "to leap up" or "to jump," conveying a sense of sudden, energetic beginning. The particle "up," from Old English up, adds a completive sense, suggesting the action brings something into being or into an operational condition. Initially used in the 16th century for the act of starting machinery, its application shifted dramatically in the 1970s to describe the launch phase of new, innovative companies, particularly in Silicon Valley. This evolution captures the metaphorical leap from concept to operational business, embodying the energy and risk of new ventures.

Structure: start + up start: From Old English styrtan (to leap up, jump up), of Germanic origin. It functions as the core verb root meaning "to begin motion or operation." up: From Old English up, upp, of Germanic origin. It functions as an adverbial particle, here intensifying or completing the action, implying the initiation of something into an active or operational state.