"Anne, Mrs. Rachel says you went to church last Sunday with your hat rigged out ridiculous with roses and buttercups. What on earth put you up to such a caper? A pretty-looking object you must have been!"
not until～になって初めて buttercupキンポウゲ caper悪ふざけ、いたずら、犯罪行為
"Oh. I know pink and yellow aren't becoming to me," began Anne.
"Becoming fiddlesticks! It was putting flowers on your hat at all, no matter what color they were, that was ridiculous. You are the most aggravating child!"
becoming toふさわしい fiddlesticksばからしい aggravating しゃくにさわる、腹立たしい
"I don't see why it's any more ridiculous to wear flowers on your hat than on your dress," protested Anne. "Lots of little girls there had bouquets pinned on their dresses. What's the difference?"
Marilla was not to be drawn from the safe concrete into dubious paths of the abstract.
"Don't answer me back like that, Anne. It was very silly of you to do such a thing. Never let me catch you at such a trick again. Mrs. Rachel says she thought she would sink through the floor when she saw you come in all rigged out like that. She couldn't get near enough to tell you to take them off till it was too late. She says people talked about it something dreadful. Of course they would think I had no better sense than to let you go decked out like that."
concrete具体性 dubious疑っている、はっきりわからない、あいまいな silly愚かな、ばかな
sink through the floor穴にでも入りたい rig out着せる deck out着飾る、飾り立てる