Component 屯 tún to gather, accumulate, store up Stroke order ▶ 屯 used in 6 characters HSK 4 顿 dùn to pause briefly HSK 5 吨 dūn ton (metric unit of mass equal to 1000 kg) HSK 6 纯 chún pure; free from impurities HSK 7 炖 dùn to stew (bring to a boil then simmer until tender, usually meat) 盹 dǔn a brief nap; a doze 钝 dùn blunt; not sharp (opposite of 快、利、锐)