At a glance

• Letter: OI
• Tree: spindle tree
• Place: the second of the five forfeda, the later letters
• Also known as: Oi
• Keywords: spindle tree, weaving, spinning, thread, completion, threshold

Lore and history

In the medieval Irish texts, the Auraicept na nEces and In Lebor Ogaim set out the forfeda, the later extra letters added onto the ogham alphabet once its original twenty had already been in use. Oir, carrying the sound OI, is named there as the second of these five forfeda, following Eabhadh and coming before Uilleann, Ifin and Eamhancholl. The tree the old sources most often give for Oir is the spindle tree, a hedgerow tree whose tough, fine grained wood was shaped by hand into spindles for spinning thread. As a forfeda letter, Oir stands a little apart from the four great aicmi that form the heart of the alphabet, a later addition recorded by the scribes who kept the ogham tradition alive in manuscript long after its carved use on stone had passed.

In a reading

In modern ogham practice, Oir is felt as the letter of the gathering thread, the quiet work of drawing many small strands into one strong line. As a forfeda it carries the feeling of something added once the main pattern was already complete: a refinement, a detail noticed late that turns out to matter. When Oir is drawn, many of us read it as a sign to finish what has been left loose, to spin scattered effort into something usable, or to trust a small addition that quietly strengthens a larger whole. The spindle tree lends its own spirit here: slender, flexible, easy to overlook in the hedge, yet steady enough to be shaped into the tool that turned raw fiber into thread for cloth. Working with Oir can feel like an invitation to patience and fine handiwork, the sense that real strength is often built thread by thread rather than all at once.

A little more

The spindle tree gets its common name from exactly what it sounds like: for centuries its hard, pale wood was carved into the spindles used for hand spinning wool and flax into thread, a craft tool so closely tied to the tree that it became its name.

Keep exploring

• Before it: Eabhadh
• After it: Uilleann
• All 25 ogham letters