wee comes from Middle English we, wei ('a little, a small amount'), originally a noun from Old English wǣg(e) ('weight, a quantity'), as in the phrase 'a little wee'. The adjectival sense developed in Scots and northern English. The path is chiefly one of transmission: an older form is taken into English, with the word's shape and meaning carried through the language names and forms preserved in the history. In modern use, the adjective sense is "very small; tiny", which keeps the etymology connected to the word's present dictionary value rather than treating it as a merely historical label. Its nearest semantic neighbors include tiny, small, minuscule, diminutive, but the etymology gives the word its own historical profile within that field. The principal historical forms in the chain include Old English wǣge, which anchor the explanation in named linguistic material.