# Vocabulary/CyclicGerund

# Cyclic gerunds

All of the modifiers that apply `u` repeatedly to `y` or portions of `y` allow `u` to be a gerund.

Such a *gerund* is a
list of
verbs
to use, with each successive use taking the next verb from `u`, and wrapping around to reuse the first verb when `u` is exhausted.

In such a case, `u` is called a **cyclic gerund**.

For example, ` u/ y ` inserts `u` between the items of `y`.

Thus, when `u` is the verb `+`

+/ 1 2 3 4 5 6 21

is the same as

1 + 2 + 3 + 4 + 5 + 6 21

But when `u` is the **cyclic gerund** ` +`* `, then

+`*/ 1 2 3 4 5 6 95

is the same as

1 + 2 * 3 + 4 * 5 + 6 95

Since a gerund is a noun, a **cyclic gerund** is recognized when the operand is a noun, in which case it can be called `m` instead of `u` .

**Cyclic gerunds** are allowed with
Rank (`m"n y`) and (`x m"n y`),
Insert (`m/ y`),
Cut (`m;.n y`) when `n` is not `3` or `_3`,
Cut (`x m;.n y`) when `n` is not `3` or `_3`,
Oblique (`/. y`),
Key (`x /. y`),
Prefix (`m\ y`),
Infix (`x m\ y`),
Suffix (`m\. y`),
Outfix (`x m\. y`)