inward

The word 'inward' is a transparent compound from Old English 'inweard', formed from the common Germanic elements 'in' and '-weard'. The suffix '-weard', meaning "turned toward" or "in the direction of", is a prolific formative in English, seen in words like 'forward', 'backward', and 'homeward'. The literal, spatial sense of "toward the interior" was extended early on to describe mental or spiritual qualities that are directed internally, hidden from outward view. This semantic shift from physical direction to psychological state reflects a common metaphorical pathway in language, where internal space is conceptualized as the realm of thought and emotion.

Structure: in (in) + ward (direction toward) - in: Old English, from Proto-Germanic, meaning "in, into". It functions as a locative prefix indicating interiority or direction into. - ward: Old English, from Proto-Germanic -wardaz, meaning "turned toward". It functions as a suffix forming adjectives and adverbs of direction.