去睡觉 to go to sleep qu shui jiao
去 qu4 is a clump of earth tu3 土 on top
and an arrow below 厶 去=土+厶
去 is a symbol of an arrow flying past the earth as the idea of “to go”. It sounds like “ktchu”. This sound does not exist in English French German Spanish Estonian Dutch or Russian. In othere words we’re fucked.
厶 si1 itself means private personal; it may be the image of a silkworm or a flexed arm “we can do it” style. Silk was China’s ancient secret and clothing items are personal and private. 厶 It is often used as a simplified pictorial element. When used as a pictorial element 厶 may also represent a triangle, an enclosed object，for example in liu 流 or tai 台， platform. 台 s a picture of a small tower).
睡 shui4 is an eyeball on the left side mu4 目. On the right is a highly stylized picture of a fully ripe stalk of grain which is heavy with ears of grain: 垂. 垂 chui2 is most often used as a symbol for heavy, drooping, but is also still used literally to mean grain ready for harvest. 睡=目+觉
觉 is a highly stylized picture of an eyeball on top of a pair of legs 见 jian beneath a roof 宀 the other two dots are either horns or the number 8 八 or accent marks from a writing system used to transcribe Korean. 觉 is a polyphone and may be prounounced jiao4 as here or jue as in juede 觉得 比如说：我觉得这个犯法不太好 Jiao 觉 means sleep: one’s eyes are closed under a roof. Jue 觉 means to feel as in perceive. It’s a person underneath a roof either sleeping or looking out the window and perceiving i.e. feeling. 见+宀+八=觉
Finally and perhaps most importantly 睡觉 can be used meaning to sleep as in sleep with. 例如:我想跟l老师睡觉 哈哈