收斂 Simplified: 收敛 On the HSK 7-9 vocabulary list, at CEFR level C2. shōuliǎn ㄕㄡ ㄌㄧㄢˇ to dwindle to vanish to make vanish to exercise restraint to curb (one's mirth, arrogance etc) to astringe to converge math. Sources CC-CEDICT, CC BY-SA 4.0 pinyinjs, Apache-2.0 国际中文教育中文水平等级标准, 中华人民共和国教育部, MIT