煉瓦 （レンガ） brick

レンガ造り （レンガヅクリ） brickwork

精錬 （セイレン） refining, refinement, smelting, training

修練 （シュウレン） training, drill, practice, practising, discipline

練る （ねる） to knead, to thicken into a paste (stirring over a flame), to polish (a plan, etc.), to refine, to elaborate, to work out, to train, to drill, to exercise, to gloss (silk), to soften, to degum, to tan (leather), to temper (steel), to walk in procession, to parade, to march