流行病

• 氵(water)RADICAL
• 㐬(swirling flow; whirlpool)PHONETIC

Water flowing in a whirlpool becomes a stream, which is the circulation of water.

• 彳(left foot step)RADICAL
• 亍(right foot; right step)ASSOCIATIVE

Left foot then right foot stepping forward is the very action of traveling down a road.

• 疒(illness; patient in bed)RADICAL
• 丙(third heavenly stem)PHONETIC

A person lying on a sickbed crying out in pain everywhere sounds like "bing."