未解之谜

• 木(tree; plant (pictographic))ASSOCIATIVE
• 一(tip of tree; treetop)ASSOCIATIVE

A small horizontal stroke on top of a tree points to an immature peak, meaning "not yet."

• 角(horn (animal))RADICAL
• 刀(blade; knife edge)ASSOCIATIVE
• 牛(cow; cattle)ASSOCIATIVE

Use a knife to separate horns from an ox — that's the meaning of "resolve" (to take apart, to decompose).

• 之(walk; arrive; step on ground)ASSOCIATIVE

A footstep moving forward on the ground represents "go to," which then becomes a grammatical particle.

• 言(words; speech)RADICAL
• 迷(enchant; lose way)PHONO-SEMANTIC

A riddle is words that captivate people so they cannot find the answer.