Geschwister

Etymology
From, from , equivalent to de. Compare 🇨🇬, 🇨🇬,, , 🇨🇬.

Noun

 * 1)  sibling

Usage notes

 * The backformed singular is uncommon and very rare. It is replaced with the diminutive  or the compound, both of which are generally restricted to children, however. Accordingly there is no gender-neutral word for an adult sibling.
 * An alternative singular may also be backformed, but this is equally rare and chiefly jocular.