Marain

noun
The shared constructed language of the Culture.
Origin
Possibly derived from maireannach (long-lived).
Source
Consider Phlebas

Farfetch

verb
The intuitive perception of a moral entirety.
Source
The Left Hand of Darkness

Hilfer

noun informal
An ethnologist of high intelligence life forms.
Source
Rocannon’s World

Hilf

noun
Acronym of “high intelligence life form”.
Source
Planet of Exile

Farborn

noun archaic
A person not native to the planet they are inhabiting.
Source
Planet of Exile

Exocluster

adjective
Of an ansible: one who sings the twinning song but is not part of a cluster.
Source
Waiting on a Bright Moon

Ansible

noun
A device that allows instantaneous communication over any distance.
Origin
Contraction of ‘answerable’.
Source
Rocannon’s World

Necrosphere

noun
An airborne swarm of self-organising inanimate matter.
Origin
Nekrós (“the dead”).
Source
The Invincible

Neantics

noun
The ontology of nothingness.
Origin
Derived from neán (young).
Source
The Sanatorium of Dr Vliperdius

Cosmeg

noun
A single star containing all the mass in the universe.
Origin
Abbreviated from ‘cosmic egg’.
Source
The Gods Themselves

Emmish

adjective informal
Behaviour characteristic of an Emotional (as distinct from a Parental or a Rational).
Source
The Gods Themselves

Batcar

noun
A battery-powered vehicle.
Source
The Lathe of Heaven