outer

The word 'outer' is a native English formation built from the fundamental Germanic root 'out,' which descends from the Proto-Indo-European úd, meaning "up, out, away." The addition of the comparative suffix '-er,' from Proto-Germanic -izô, creates a relational term meaning "more out" or "further out." This comparative logic directly yields the modern senses of being situated externally relative to something else or being positioned at a greater distance from a central point. Its development exemplifies the straightforward and productive morphological processes within the Germanic branch of the language.

Structure: out + er - out: Old English origin, meaning "outside, outward, away." Functions as the core adjective/adverb root. - er: Old English suffix, a comparative suffix used to form the comparative degree of adjectives and adverbs.