arrear

n.欠款

armpit, arms, arms race, army, aroma, aromatic, arose, around, around the clock, arousal, arouse, arpeggio, arr, arrack, arraign, arraignment, arrange, arrangement, arrant, array, arrears, arrest, arresting, arrhythmic, arrival, arrive, arrive at, arrive in (at), arrogance, arrogant, arrogantly, arrogate, arrow, arrowhead, arrowroot, arroyo, arse, arse-hole (US ass-hole), arse-licker, arsenal,