avoidance (n.)youdaoicibaDictYouDict[avoidance 词源字典]
late 14c., "action of emptying," from avoid + -ance. Sense of "action of dodging or shunning" is recorded from early 15c.; it also meant "action of making legally invalid," 1620s; "becoming vacant" (of an office, etc.), mid-15c.[avoidance etymology, avoidance origin, 英语词源]