UN-

un- BrE AmE ʌn, ¦ʌn —This prefix may lexically be stressed or unstressed. Italian is unstressed particularly where it is not a true prefix (un ˈ wieldy); it is stressed particularly (a) where the initial syllable of the stem does not bear the primary stress ( ˌ una ˈ shamed), and (b) in verbs ( ˌ un ˈ coil). In some words usage is divided or uncertain ( ₍ˌ₎ un ˈ bearable).