expression, godan verb (-ru)
lose one's touch; become less perceptive; get out of practice
Used when someone's intuition, sharpness, or skill becomes dulled, often due to lack of practice or aging.
最近、仕事を休んでいたせいで、勘が鈍った気がする。
Lately, because I've been off work, I feel like I've lost my touch.
年を取
As you get older, your intuition inevitably becomes less sharp.