shifty

The word 'shifty' is a native English formation, built upon the Old English verb sciftan, meaning to arrange, divide, or change. The core semantic concept is one of movement or change. By the 16th century, the verb 'shift' had developed the specific sense of changing position or resorting to expedients, often to evade difficulty. The adjectival suffix '-y' was then appended, creating 'shifty' in the late 16th century to describe a person or their behavior as 'characterized by shifting'. The logic evolved from the literal act of moving position to the figurative sense of being evasive, unreliable, and deceitful, as one who is constantly 'shifting' their stance or story.

Structure: shift (move/changed) + y (adjective suffix) - shift: From Old English sciftan (to arrange, divide, change), of Germanic origin. In this word, it carries the sense of moving/changing position. - y: A native English suffix forming adjectives from nouns and verbs, meaning "characterized by" or "full of".