How to read: かぎずみ
Pronunciation: 
Names and idioms with total stroke of 27:
寒蝉 国士無双 胆嚢 鉄納戸 禁固刑
Names and idioms similar to 鉤墨:
石墨 墨版 墨烏賊 墨台 子持鉤手水母
Yojijukugo(idioms with 4 Kanji characters) including 鉤墨:
鉤章棘句 墨子薄葬 墨守成規
Idioms including 鉤墨:
孔席暖まらず、墨突黔まず 墨子糸に泣く 墨守