adj
[Date: 1400-1500; Language: French;Origin: stupéfier, from Latin stupefacere, from stupere ( STUPID¹) + facere 'to make, do']
so surprised, tired, or bored that you cannot think clearly
　I stared up at Keith in stupefied amazement.
　We sat there stupefied.
>stupefaction [,stjuːpɪ'fækʃən (US) ,stuː-/