Monosyllabic  Or Color Trousers Dark Light Patern 半~不~

不~不~ used with two monosyllabic adjectives or location words with opposite meanings to indicate something is "just right," or sometimes used to indicate a dissatisfying intermediate state. It is also used with antonymic monosyllabic verbs or morphemes to indicate "if not... will not...," or used with two monosyllabic synonyms as an emphatic form of "not."