Simplified:

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

xiù ㄒㄧㄡˋ

    • to rust

How 鏽 is written

    部首 radical
    a form of
    笔画 strokes
    21, with 12 after the 部首
    结构 structure
    左右结构
    偏旁 parts
    形旁 meaning
    声旁 sound

    Sources