Hearthmate

noun
One’s fellow resident in a shared household.
Source
Coming of Age in Karhide

Nakalchi

noun
A bio-synthetic being spawned from a mother-machine.
Origin
Naqal (imitation).
Source
Oblivion: A Journey

Kleggich

noun
Menial work done for the communal good.
Source
The Dispossessed

Frelk

noun informal
A person who is sexually attracted to spacers.
Origin
Abbreviation of ‘free-fall-sexual-displacement complex’.
Source
Aye, and Gomorrah…

Parachronion

noun
A device enabling travel to parallel time lines.
Origin
Derived from pará (nearby) and khrónos (time).
Source
Eutopia

Terranaut

noun
The intrepid breed of men that go down into the uncharted seas of time gas below Earth’s crust.
Origin
Derived from terra (ground) and nautēs (traveller).
Source
The Night That All Time Broke Out

Galaktika

noun
The shared language of the League of All Worlds.
Origin
Corruption of ‘galactic’.
Source
City of Illusions

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