to slide down (a slope etc); (fig.) to decline
下 (xià) · 3 strokes
Originally a small line or dot below a longer line, indicating "down". The vertical line was added to distinguish the character from 二 (two). Opposite of 上.
滑 (Huá) · 12 strokes
Phonosemantic compound. 氵 represents the meaning and 骨 represents the sound.