Meanings of chestnut burr in English

I know my chestnut burr too well to mind his prickles.

His head was a faithful replica of a chestnut burr.

Uncle Amos says still she's prickly like a chestnut burr.

First it was like swallowing a chestnut burr; now, old hand-made Bourbon couldn't be smoother.

As they parted, a heavy horse chestnut burr fell to the floor with a loud thump!

Julie says she's sharp and prickly as a chestnut burr, but with the sweetest of hearts inside.

One October day I was walking on a country road, and a chestnut burr lay in my path.

But he said after a moment, "Annie, dear, won't you let me interpret another chestnut burr for you?"

Since no mutual friend is present to introduce us, has not Nature taken upon herself the office through this chestnut burr?

One of the boys in the back seat said, in a half whisper, "It is nothing but a chestnut burr."

You are like a chestnut burr, prickly outside, but silky-soft within, and a sweet kernal, if one can only get at it.

Suffice it to say that if you had always lived in the city you could not have interpreted a chestnut burr so gracefully.

One grower, not to be outdone by the patient Chinaman or Japanese, in September ties up each chestnut burr in a cloth sack.

O, Mr. Gregory, you may think me foolish, but that strange little omen of the chestnut burr is in my mind so often!

Then he started on his search, but kept looking back so often that she laughed, and said, "I'm not a chestnut burr."

For the next two days the men rested, replenishing their strength; but Fraser developed a wolfish temper which turned him into a veritable chestnut burr.