Definition of rantankerous in English:

rantankerous

adjective

Southern, US, Regional
informal, rare
  • Ill-tempered, quarrelsome, ‘ornery’; = "cantankerous".

Origin

Mid 19th century; earliest use found in James Kirke Paulding (1778–1860). Alteration of cantankerous, probably after either rancorous or rant.

Pronunciation

rantankerous

/ranˈtaŋk(ə)rəs/