pyracanth
‘an evergreen shrub with thorns belonging to the apple family’
Lexical development traced from the Tamil root:
Mod.Lat. pyracantha < Gk. pyrakantha < pyr ‘fire’ + akantha, akanthos ‘thorn, thorny plant’ < uhk < ak- < Tamil akku
pyracanth
English words derived from akku connoting 'sharpness'