alterity; otherness
Philosophical term referring to the quality of being other or different, especially in discussions of self and other.
In philosophy, alterity is an important concept when considering the relationship between self and other.
Compound of 他者 (tasha, 'other person') + 性 (sei, '-ness, quality'). The exact historical derivation is uncertain, but it follows a common pattern for forming abstract nouns in modern Japanese philosophical vocabulary.