To harden and get brittle, as dry mud and the like. Nagbágtik ang lúnang. The mud has hardened. Nabagtikán sía sing lúnang sa íya mga panápton. Some mud got dry and hard on his clothes. Nagbágtik ang kalámay sa kaláhà. The sugar in the pan is overdone i.e. has dried and hardened to the point of emitting a smell of scorching or burning.