后信号灯

• 口(mouth; door)RADICAL
• 后(behind; empress (figuratively—one who rules from behind))ASSOCIATIVE

A mouth giving orders from behind the golden throne is the authority of an empress.

• 亻(person; human)RADICAL
• 言(speech; words)ASSOCIATIVE

A person who keeps their word true is the one worthy of trust.

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

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

• 火(fire)RADICAL
• 丁(nail; peg)PHONETIC

A lamp uses fire to shine brightly, and its sound reading is suggested by the component ding.