堆积 duījī to pile up Origin Definitions Defs Strokes Stroke Words Sentences Sents duījī to pile up 堆 duī verb to pile up to stack, heap, or gather items together; to accumulate积 積 jī verb to accumulate to amass; to store up; to gather over timeduījī accumulation 堆 duī noun pile a heap or stack of things积 積 jī verb to accumulate to amass; to store up; to gather over time