The term 'see-through things' can be summarized by the crossword solution 'panes, ' which is a five-letter word. Panes are thin sheets of glass, plastic, or other transparent material that are used to divide a space, such as in windows or doors. They are also used to protect and enclose an area, such as in greenhouses or conservatories. Panes are often used to allow light to enter a space while still providing privacy.