The word "onerous" is an adjective which means burdensome, troublesome or causing a lot of problems. It can also mean something that requires a great deal of effort or responsibility and is difficult to bear.
Ashcroft and the Tories have refused to answer questions about when Ashcroft fulfilled the less onerous task of declaring himself a long - term resident, which allowed him to continue to be a «non-dom» paying tax only on his UK earnings and avoiding giving tens of millions of pounds to the tax office on his substantial international estate. (theguardian.com)
This involves onboarding vendors across a range of markets spanning Asia, Africa and South America and making the Know Your Customer and credit approval processes less onerous for vendors. (gfmag.com)
Maximus's picture of deification glows almost brazen as he risks outstripping analogy by insisting that saints «become the Lord Himself, if such an idea is not too onerous for some to bear» (Amb. (firstthings.com)