Dreye權威釋義|onerous

a.

繁重的；麻煩的
The prisoners were required to do onerous work at the mining field with no pay every day.
這批囚犯每天被要求在礦場裡做艱苦而且沒有酬勞的工作。
負有義務的；有償的

ad.

onerously

n. [U]

onerousness

同義參見:

以上來源於：《英漢大辭典》

/ˈəʊn(ə)rəs, ˈɒn-/

adj.

involving a great deal of effort, trouble, or difficulty.

▸Law involving heavy obligations.

ME: from OFr. onereus, from L. onerosus, from onus, oner- ‘burden’.

以上來源於：《簡明牛津英語詞典》