to carry coals to newcastle
01
余計なことをする, 無駄な労力をかける
to undertake something that is pointless
Dialect
British
idiom
old use
例
Trying to sell umbrellas on a rainy day in a place where there are many umbrella vendors is like taking coals to Newcastle - it's unnecessary and redundant.
プロの編集者に基礎文法を教えるなんて余計なことだ。



























