onerous

onerous
[ˈəʊn(ə)rəs, ˈɒn-]
adjective
  1. (of a task, duty, or responsibility) involving an amount of effort and difficulty which is oppressively burdensome
    (任务、责任等)繁重的;费力的;困难的
    he found his duties increasingly onerous.
    他发现自己的职责越来越繁重了。
    ■(Law)involving heavy obligations
    (律)义务繁多的
    an onerous lease.
    义务繁多的租赁。
派生
onerously
adverb
onerousness
noun
语源
  1. late Middle English: from Old French onereus, from Latin onerosus, from onus, oner- 'burden'
英语宝典
考试词汇表