1. to dispatch; to send someone
E.g.: 差遣 (dispatch), 差配 (management)
2. to differ; to be unequal; discrepancy
E.g.: 差異 (difference), 差別 (discrimination)
3. gap; difference; margin
E.g.: 差額 (difference in amount), 時差 (time difference)
4. to insert; to put in
