On the HSK 7-9 vocabulary list, at CEFR level C2.

cèng ㄘㄥˋ

    • to rub against
    • to walk slowly
    • to freeload

      coll.

How 蹭 is written

    部首 radical
    笔画 strokes
    19, with 12 after the 部首
    结构 structure
    左右结构
    偏旁 parts
    形旁 meaning
    声旁 sound

    Sources