头头是道

• 大(large; big)RADICAL
• ⺀(two dots indicating hair; top of head)ASSOCIATIVE

The head is the largest and most prominent part on the human body.

• 日(sun; light)RADICAL
• 疋(foot; walk straight)PHONETIC

Under the clear light of the sun, everything appears as it truly is — that is what 'correct, right' means.

• 辶(step; move)RADICAL
• 首(head; lead)PHONO-SEMANTIC

The head leads the way for feet to follow down a path.