1. Without warning or announcement
   - unannounced, unheralded

See also: unexpected

• neurasthenic
• neurectomy
• neurilemma
• neurilemoma
• neurinoma
• neuritis
• neuro-
• neuroanatomic
• neuroanatomical
• neuroanatomy
• neurobiological
• neurobiologist
• neurobiology
• neuroblast
• neuroblastoma
• neurochemical
• neuroendocrine
• neuroepithelium
• neuroethics
• neurofibroma
• neurofibromatosis
• neurogenesis
• neurogenic
• neurogenic bladder
• neuroglia