K is for Kantha
Kantha can refer to a patched textile or a style of embroidery found in India. You can look it up for more information.
Kantha has become somewhat of a buzzword in the last years.
But basically a Kantha Stitch is simply a running stitch. It can be a quilting stitch (functional) or an embroidery stitch (decorative) depending on how it is used.