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not easy to do, deal with, or understand
using a lot of effort
needing a lot of time, ability, and energy
difficult to deal with or achieve, but interesting and enjoyable
extremely difficult and involving a lot of effort
difficult, and needing a lot of physical or mental effort
extremely difficult, tiring, or damaging
difficult to do, deal with, or understand, especially because of involving a lot of different processes or aspects
to be difficult, tiring, or boring to do
when electronic information is lost because the software or devices needed to read it are no longer available
a small fish that lives in rivers and lakes
a company that pays its employees to write online comments in favour or against somebody or something posing as ordinary Internet users
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Free thesaurus definition of difficult to do and involving a lot of effort from the Macmillan English Dictionary - a free English dictionary online with thesaurus and with pronunciation from Macmillan Publishers Limited.