How are arch and coy related for clue playful?

"Arch" and "coy" are related in that they both describe playful, teasing behaviors. "Arch" often refers to a playful or mischievous demeanor, while "coy" describes a flirtatious or shy quality that can be used to engage in playful banter. Together, they suggest a lighthearted and teasing interaction that is often found in social or romantic contexts.