Truckle: to yield out of weakness

Most of us know what a trundle bed is.  In case you don’t, a trundle bed is a low bed on wheels.  When not in use trundle beds slide beneath other beds.  

Evidently, in some places, trundle beds are truckle beds.  Truckle comes from the Greek word from Greek τροχός (trochos) meaning wheel.

It turns out, truckle, in English has another meaning.  To truckle is to yield out of weakness.  I suppose this is because someone who truckles easily would be comfortable lying down in a truckle/trundle bed.  

I was truly impressed last year when the Canadian truckers didn’t truckle to Trudeau.  Also, I have never used ‘tr’ that many times in another sentence.