(shū, ㄕㄨ) to dredge; to clear away obstruction; thin; sparse; scanty; distant (relation); not close; to neglect; negligent; surname Shu; to present a memorial to the Emperor; commentary; annotation [CE-DICT]
于
(Yú, ㄩˊ) surname Yu [CE-DICT]
(yú, ㄩˊ) in; at; to; from; by; than; out of [CE-DICT]
防
(fáng, ㄈㄤˊ) to protect; to defend; to guard (against) [CE-DICT]
(shū, ㄕㄨ) to dredge; to clear away obstruction; thin; sparse; scanty; distant (relation); not close; to neglect; negligent; surname Shu; to present a memorial to the Emperor; commentary; annotation [CE-DICT]
于
(Yú, ㄩˊ) surname Yu [CE-DICT]
(yú, ㄩˊ) in; at; to; from; by; than; out of [CE-DICT]
防
(fáng, ㄈㄤˊ) to protect; to defend; to guard (against) [CE-DICT]