防 | fáng | to protect; to defend; to guard against; to prevent |
追 | zhuī | to chase after; to seek; to do one's utmost to seek or procure sth; to recall |
duī | to sculpt; to carve; musical instrument (old) | |
工具 | gōng jù | tool; instrument; utensil; means (to achieve a goal etc) |