fierce, be(come)பயங்கரமாகுpayaṅkaramāku(bayangramaahu)(3b intr)be or become terribly bad or severe, as a cold, fever, etc.; be or become eager; as a competition, a debate, a fight, etc.; be or become violent, wild, intense or forceful, as wind or storm
Usage:
அவன் காய்ச்சல் பயங்கரமாகிவிட்டதுavaṉ kāyccal payaṅkaramākiviṭṭatu
avan kaaccal bayangramaayiḍuccu
His fever became really fierce.