"unguarded" is a perfectly acceptable word in written English.
You can use it to describe something that is physically or emotionally exposed and vulnerable. For example, "The unguarded look in his eyes revealed a deep sadness."
They have been helped to an extent by unguarded statements from MPs who should know better or, at least, show have grasped that their words could be twisted.
The area senator Ahmed Zanna, who put the death toll at 300, said the town had been left unguarded because soldiers based there had been redeployed north towards Lake Chad in an effort to rescue the schoolgirls.
I've come to believe over the years that she had an unerring instinct for that which is unguarded and authentic in a person, which is why her photographs are so democratic and why she belonged to the Observer.
Spotters on both sides update smugglers on the movements of law enforcement and rafts of families are dispatched to distract the border patrol so drugs can be moved across in unguarded places a little further along the river.
Any response from what he learned was always going to be direct and unguarded".
Tomas Rosicky fed Walcott and his driven low centre picked out Giroud, who gleefully lifted the ball high into the unguarded net from close range.
Well done to Eto'o for coming up with a routine that made everybody smile and diffused the controversy of José Mourinho's unguarded comments about the striker's age.
Gove was increasingly unguarded in his approach towards the PM himself.
Discontent grew when in an unguarded comment before an interview with a local TV station, David Cameron said: "It's the Tamar, not the Amazon, for heaven's sake".
Asked in an unguarded moment during an interview how often he went to Ireland he replied coldly that he never went to Ireland but frequently went to Ulster.
There was also an immediate and unguarded friendliness, so I was a bit surprised and very charmed".
