9 - ISA

Isa is an "elemental" rune and a direct reference to the element of water in it's frozen state, or ice. It's form (the single vertical stave) can be seen in nearly all of the other runes and is meant to symbolically represent an icicle. link

d-thinker

It is also a way to save without paying taxes in England. Basically money is frozen when it is saved, or perhaps like an icicle it can mean hidden assets. Or a hidden talent, or a necessity to keep on learning. A line is also the most basic of shapes, so it could also mean living life in a way that is back to basics! I made 3 patterns inspired by a straight line from a water colour painting of a straight line: