Expressions (phrases, clauses, etc.), Godan verb with 'ru' ending
to become senile; to show signs of decline; to lose one's edge; to lose one's touch; to lose one's astuteness
Idiomatic expression
彼の今回の判断、理解に苦しむね。焼きが回ったということかね。I have a hard time seeing the logic of this latest decision of his. He just isn't as sharp as he used to be.
Also written 焼きが回る【やきがまわる】