taxing

The Remains of the Dayを読んでいて "taxing" が出てくるのはこれで2度目なので覚えたいとおもいます。　Stevensの旅行の目的、Miss Kentonに会うのも明日になりました。
But then again, what is the purpose in endlessly speculating as to Miss Kenton's present wishes when I will be able to ascertain these from her own person tomorrow? And in any case, I have drifted considerrably from the account I was giving of this evening's events. These last few hours, let me say it, have proved unreasonably taxing ones.
"taxing" の意味を調べます。
・Merriam-Webster's Online Dictionary: onerous, wearing (a taxing operatic role): The journey proved to be very taxing.
・Cambridge Dictionaries Online: difficult or needing a lot of thought or effort: I like a bit of light reading when I'm on holiday - nothing too taxing.
・Oxford English Dictionary: physically or mentally demanding: they find the work too taxing
"taxing" にこの様な意味があるのは動詞の "tax" に
・Macmillan Dictionary: formal to cause problems, or to make things difficult for someone: The crowds have severely taxed the security services.: Having to repeat things constantly can really tax your patience.
日本を取巻く諸々の状況からするとやはりTAXはなんだかんだで上がって行くのでしょうね。