i Register
In some senses, earthish is marked as archaic. Watch for register when choosing this word.
adj
Made of or pertaining to earth; earthly, earthy.
adj
Resembling the Earth; Earthlike.
I love it when planets are found around red dwarfs. They are by far the most common kind of star in the Universe, they tend to make smaller, Earthish-sized planets, and they tend to make a lot of them.
Relating to or originating from the Earth.
name
A hypothetical universal language of Earth.