进步号

• 辶(step; move)RADICAL
• 井(well; water well)PHONETIC

To advance forward like taking quick steps toward a well to get water.

• 止(foot (pictographic))RADICAL
• 止(second foot below)ASSOCIATIVE

A step is two feet, one above the other, following each other moving forward.

• 口(mouth; opening)RADICAL
• 丂(labored breathing; breathlessness)PHONETIC

A mouth releasing strong breath to call out a name or command.