瓮 ⇒
瓮 wèng/Wèng, [甕]/[罋], variant of 甕|瓮[wèng]/earthen jar/urn, surname Weng, pottery container for water,...
瓮中之鳖 wèngzhōngzhībiē, [甕中之鱉], lit. like a turtle in a jar/to be trapped (idiom)
棺 ⇒
棺材 guāncai, coffin/CL:具[jù],口[kǒu]
石棺 shíguān, sarcophagus
棺 guān, coffin
棺木 guānmù, coffin
盖棺论定 gàiguānlùndìng, [蓋棺論定], don't pass judgment on a person's life until the lid is on the coffin (idiom)