laches

n. 懈怠, 疏忽
【经】 疏忽, 拖延

lach.es

n.（名词）
Negligence or undue delay in asserting a legal right or privilege.
怠慢罪：忽视或不至鲁莽的延迟以主张某个法律上的权利或是利益

来源：
Middle English [slackness, negligence]
Middle English [slackness, negligence]
from Anglo-Norman lachesse, laches
from Anglo-Norman lachesse, laches
from Old French laschesse
from Old French laschesse
from lasche [loose, remiss] * see lush
from lasche [loose, remiss] *参见 lush