疏于 Traditional form: 疏於 Pinyin (reading): shūyú Definitions: to fail to pay sufficient attention to to be negligent in regard to to be lacking in Characters: 疏 - to neglect; to dredge, to clear away; lax, careless 于 - at, in, on; to, from; alas! Traditional characters: 疏 - to neglect; to dredge, to clear away; lax, careless 於 - at, in, on; to, from; alas!