2 adjectives to describe marmites

Shrapnel and air-bombs, incendiary shells and monstrous marmites had fallen within its boundaries week by week; sometimes only one or two on an idle day, sometimes in a raging storm of fire, but always killing a few more people, always shattering another house or two, always spoiling another bit of sculptured beauty.

Une marmite (slang).

2 adjectives to describe  marmites