The compound "stand-up" originates from the phrasal verb "to stand up," which has Old English roots. The literal sense of rising to one's feet evolved metaphorically. By the early 20th century, it began describing a form of comedy where a performer stands alone on stage addressing an audience directly, contrasting with seated or sketch-based acts. The adjective describing personal character, as in "a stand-up guy," derives from the idea of someone who is upright, reliable, and willing to "stand up" for what is right.

Structure: stand (to be upright) + up (to a vertical position) - 'stand': From Old English standan, meaning "to occupy a place, stand firm, be valid". Its functional role is the core verb denoting an upright position or action. - 'up': From Old English up, upp, meaning "upward, aloft". Its functional role is an adverbial particle modifying the verb, indicating direction or completion of the action.