積もり積もる

(1)collect or gather; "Journals are accumulating in my office"; "The work keeps piling up"

(2)集まるか、集合する

(3)form or accumulate steadily; "Resistance to the manager's plan built up quickly"; "Pressure is building up at the Indian-Pakistani border"

(4)着実に形成しまたは蓄積する

(1)