It means decrease row.
Cast on. Put the original row of loops on the needle.
rnd is the abbreviation for round meaning one row
No, in knitting MS does not mean front and wrong side of the row. MS means moss stitch. In this type of stitch, you knit two two rows of the same sequence (purl or knit) and then alternate them.
knit one (probably referring to one stitch unless it says row after it)
Stocking Stitch (knit a row, purl a row, repeat)
I assume you mean stocking stictch? that is knit one row, purl the next, so that you have the wavy pattern on one Garter stitch is plain knitting every row.
It stands for "Every Other Row". In this case, it means "Repeat every other row three more times".
A diamond-shaped knitting pattern is popular on sweaters and vests. The diamond pattern is made by knitting and purling, increasing on each row until you get to the mid-row on the diamond, then working the pattern in reverse to complete the diamond.
A marked stitch is a stitch where you have placed a knitting marker. A pattern may tell you to place a marker at a certain stitch, and to do some particular thing in a subsequent row when you come to that marked stitch.
I believe the word is misspelled --- more than likely the word should be garter - meaning every row is knit - which gives you a lateral rib.
yrn is the abbreviation for 'yarn' - the material you are knitting or crocheting with
Initially have one extra stitch in the row. When you join, knit the last stitch together (knitting 2 together, in effect) with the first one.