ostentatious

showy or pretentious

Roots

-ous / -ious: full of or marked by a quality
ostent: show, display, or hold out for view

Other words with the ostent root

ostensible: stated or appearing to be true, but possibly not real
ostentation: showy display meant to impress

Ostentatious display holds itself out to be seen: showiness asking for witnesses.

The lobby was so ostentatious that it felt more like a palace than an office.

Ostentatious is not just fancy. It is display with an audience in mind. The watch, lobby, outfit, or sentence is not merely expensive; it seems to be saying, please notice me.