累积 Traditional form: 累積 Pinyin (reading): lěijī Definitions: to accumulate Characters: 累 - tired; to accumulate; to involve; bother, nuisance 积 - to store up, to amass, to accumulate Traditional characters: 累 - tired; to accumulate; to involve; bother, nuisance 積 - to store up, to amass, to accumulate