guise

The word 'guise' entered English in the late 13th century from the Old French 'guise,' meaning "manner, fashion, or way." The Old French term itself is of Germanic origin, derived from the Frankish 'wīsa' or a similar West Germanic source, meaning "manner" or "way." This Germanic root is also the ancestor of the English word 'wise' (as in manner or way, seen in phrases like "in this wise"). The core semantic journey is from a concrete sense of "manner or way of doing something" to the more specific modern meaning of an assumed manner or external appearance, often intended to deceive or create a particular impression.

The word 'guise' is a simplex loanword from Old French. It cannot be meaningfully segmented into smaller, independent morphemes within its current English spelling.