amiss
adj. C2 Proficiency US //əˈmɪs// UK //ɐmˈɪs// amiss
adj. wrong, bad, or not quite right. You use this when something is slightly off or doesn't feel quite normal.
adj. improper, wrong, or not quite right. Often used in the phrase 'something is amiss' to indicate a sense of unease or a perceived fault.
Something is amiss with the car engine.
The manager noticed something was amiss when the sales figures didn't match the inventory reports.
A sense of unease settled over the group as they realized something was amiss with the carefully prepared schedule for the evening's performance.
From a- + miss.