Made of brick or resembling brick; constructed with bricks (rare or archaic usage).
From 'brick' plus '-en' (a suffix forming adjectives, as in 'wooden' or 'woolen'). This is an archaic or poetic way to describe something brick-like.
English has 'wooden,' 'golden,' and 'leaden,' so 'bricken' should exist and it did—but it lost out to 'brick' as an adjective ('brick house' instead of 'bricken house'), showing how English gradually simplified its adjective-forming suffixes.
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