aperiodic /ā-pē-ri-odˈik/

1. Not periodic
2. Highly damped and coming to rest without oscillation (physics)

aperiodicity /-ə-disˈi-ti/ noun

• uncaused
• unce
• unceasing
• unceasingly
• uncelebrated
• uncensored
• uncensorious
• uncensured
• uncerebral
• unceremonious
• unceremoniously
• unceremoniousness
• uncertain
• uncertainly
• uncertainness
• uncertainnesses
• uncertainties
• uncertainty
• uncertainty principle
• uncertificated
• uncertified
• unces
• uncessant
• unchain
• unchained