undersurface (noun)

1. The designer showcased an innovative collection with an emphasis on texture and detail on the undersurface of the garments.

2. The painting featured intricate brushstrokes and vibrant colors, drawing attention to the undersurface of the subject.

3. The superhero's cape billowed, revealing the symbol on the undersurface, ready for action.

4. In the futuristic world described in the novel, advanced technology enabled humans to travel seamlessly on the undersurface of the ocean.