Which word refers to something that is tastelessly showy?

The term "meretricious" is used to describe something that is showy and attractive in a superficial or tasteless way, often with an implication of deceit or insincerity. This word often relates to something that is attractive but lacks real value or substance, denoting a sense of gaudiness or ostentation that is more about appearance than quality or merit.

The other options do not align with this meaning. "Inveigh" refers to speaking or writing about something with great hostility. "Mettle" pertains to a person's ability to cope well with difficulties and challenges, indicating resilience rather than showiness. "Intricate" describes something that is complex and detailed, usually in a positive sense, which does not connote tastelessness or showiness. Thus, "meretricious" most appropriately captures the essence of something that is tastelessly showy.