通 On the HSK 2 vocabulary list, at CEFR level A2. tōng ㄊㄨㄥ to go through to know well expert suffix to connect to communicate open to clear classifier for letters, telegrams, phone calls etc tòng ㄊㄨㄥˋ classifier for an activity, taken in its entirety (tirade of abuse, stint of music playing, bout of drinking etc) Where 通 is used Example sentences and grammar articles using 通 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