Not prepared or vigilant.
1The advantage always lies in catching the other fellow off his guard.
2It put him right off his guard after he'd disposed of that.
3The sudden change in his wife's manner threw him off his guard.
4Thus thrown off his guard, he blindly dashed into the wrong channel.
5For a fraction of a second he was caught off his guard.
6He is strong and subtle, but I talked him off his guard.
7Therefore she put her question, and Wogan was taken off his guard.
8I ventured nonchalantly, with a view to taking him off his guard.
9Hanging limp, and apparently senseless, I put him quite off his guard.
10Sam gave a queer little laugh as if taken off his guard.
11If he was off his guard now, the trick was worth it.
12He was not, however, a man to be taken off his guard.
13Thrown, for a moment, off his guard, he replied with some warmth-
14Adax had tried to rush him once off his guard, Totho realized.
15But his eyes were kind, and that put Nate off his guard.
16Taken off his guard he toppled backwards into the arms of his attacker.