積ん読 つんどく buying books and not reading them; stockpiling books; tsundoku n vs books bought but not read n Advanced ➥
積 セキ つ.む • -づ.み • つ.もる • つ.もり volume; product (x*y); acreage; contents; pile up; stack; load; amass Grade Level 4 16 Strokes ➥