utilization or exercise

the act of rubbing or wiping

a brittle transparent solid with irregular atomic structure

a framework of wood or metal that contains a glass windowpane and is built into a wall or roof to admit light or air

the act of directing the eyes toward something and perceiving it visually

a feeling of delighted approval and liking

precipitation falling from clouds in the form of ice crystals

put (things or places) in order

the vertical dimension of extension; distance from the base of something to the top

something immaterial that stands in the way and must be circumvented or surmounted