IPA: /ʌnˈɜːrθliːnəs/
KK: /ʌnˈɜrθliːnəs/
The quality of being strange, unusual, or not of this world; often related to something ethereal or otherworldly.
The unearthliness of the landscape made it feel like a scene from a dream.
Unearthliness → It is formed from "un-" (meaning not) and "earthly" (from Old English "eorþe", meaning of the earth). The word "unearthliness" refers to something that is not of this earth or has a supernatural quality.
Think of 'not' ('un-') being combined with 'earthly' to remember that 'unearthliness' describes something that is beyond the earthly realm.