Automatic and Persistent

noun

• Light machine gun.
  • synonyms: automatic rifle, machine rifle
• A pistol that will keep firing until the ammunition is gone or the trigger is released.
  • synonyms: automatic pistol

adjective

• Operating with minimal human intervention; independent of external control.
  • usage: "automatic transmission"; "a budget deficit that caused automatic spending cuts"
• Resembling the unthinking functioning of a machine.
  • usage: "an automatic `thank you'"; "machinelike efficiency"
  • synonyms: automatonlike, machinelike, robotlike, robotic
• Without volition or conscious control.
  • usage: "the automatic shrinking of the pupils of the eye in strong light"; "a reflex knee jerk"; "sneezing is reflexive"
  • synonyms: reflex, reflexive

adjective

• Never-ceasing.
  • usage: "the relentless beat of the drums"
  • synonyms: relentless, unrelenting
• Continually recurring to the mind."haunting memories"; "the cathedral organ and the distant voices have a haunting beauty- Claudia Cassidy
  • synonyms: haunting
• Retained; not shed.
  • usage: "persistent leaves remain attached past maturity"; "the persistent gills of fishes"
  • synonyms: lasting
• Stubbornly unyielding.
  • usage: "dogged persistence"; "dour determination"; "the most vocal and pertinacious of all the critics"; "a mind not gifted to discover truth but tenacious to hold it- T. S. Eliot; "men tenacious of opinion"
  • synonyms: dogged, dour, pertinacious, tenacious, unyielding

• (a.) Inclined to persist; having staying qualities; tenacious of position or purpose.
• (a.) Remaining beyond the period when parts of the same kind sometimes fall off or are absorbed; permanent; as, persistent teeth or gills; a persistent calyx; -- opposed to deciduous, and caducous.