Below are the words that matched your query...
Unprompted
- proceeding from natural feeling or impulse without external stimulus; "an impulsive gesture of affection"
Uttered
- communicated in words; "frequently uttered sentiments"
- articulate; either verbally or with a cry, shout, or noise; "She expressed her anger"; "He uttered a curse"
- express in speech; "She talks a lot of nonsense"; "This depressed patient does not verbalize"
- express audibly; utter sounds (not necessarily words);
- put into circulation; "utter counterfeit currency"
Unstoppable
- not capable of being stopped; "as unstoppable as the wind"
Unsyllabic
- not forming a syllable or the nucleus of a syllable; consisting of a consonant sound accompanied in the same syllable by a vowel sound or consisting of a vowel sound dominated by other vowel sounds in a syllable (as the second vowel in a falling diphthong); "the nonsyllabic `n' in `botany' when it is pronounced `botny'"; "the nonsyllabic `i' in `oi'"
Unsyllabled
- not articulated in syllables
Unfluctuating
- not liable to fluctuate or especially to fall; "stocks are still firm"
Unstaged
- not performed on the stage
Unperformed
- not performed; "the author of numerous unperformed plays"
Unaccepted
- not conforming to standard usage; "the following use of `access' was judged unacceptable by a panel of linguists; `You can access your cash at any of 300 automatic tellers'"
Underfed
- not getting adequate food; "gaunt underfed children"; "badly undernourished"