舂牆 (zung1 coeng4) — to bang head against the wall; to strengthen a construction wall with red clay and sandstone in Cantonese
zungˉ¹舂coengˎ₄牆简 舂墙
Mandarin Pinyin: chong1 qiang2
Meaning of 舂牆
nounto bang head against the wall; to strengthen a construction wall with red clay and sandstone