Superlative form of bricky; most brick-like in appearance, texture, or quality, or containing the most bricks.
From 'bricky' plus '-est' (the superlative suffix used to describe the maximum degree of a quality). This follows standard English adjective formation patterns.
In architecture, 'brickiest' often describes Victorian-era buildings that display maximum brick as decoration—some architects would create elaborate patterns and colors with bricks purely for aesthetic effect!
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