566: feckless Jun 26, 2016

Although it is true that there is a regional variant of the word 'fuck' in parts of the UK: feck, the word feckless is not the opposite, as such. The word is from the Scots and northern English dialect word 'feck' which is diminutive of 'effeck', which is the word for 'effect' in those dialects, in that someone who is feckless will effect no change.