Sheer has many definitions.
** being free from an adulterant : PURE, UNMIXED
** viewed or acting in dissociation from all else
** marked by great and continuous steepness
** of very thin or transparent texture : DIAPHANOUS
** (obsolete use) : BRIGHT, SHINING
** a sheer fabric
** straight up or down without a break : PERPENDICULARLY
** in a complete manner : ALTOGETHER
** a turn, deviation, or change in a course (as of a ship)
My soul is sheer.