人所共知

• 人(person; human (pictographic))ASSOCIATIVE

The character 人 depicts a person standing with legs spread wide apart for stability.

• 户(door; house)RADICAL
• 斤(axe)PHONETIC

A place is where a house door stands, using an axe to chop and erect a tree.

• 廾(two hands lifting up)ASSOCIATIVE
• 一(one; together)ASSOCIATIVE
• 八(eight)PHONETIC

Two hands lifting an object together convey the meaning of "together" or "shared."