lower (become)குறைkuṟai(kore)(2b intr)(of price, temperature, water level, etc.) grow less; diminish or decrease; go down; sink, plummet
Usage:
அந்த அணையில் தண்ணீர் மட்டம் குறைந்ததுanta aṇaiyil taṇṇīr maṭṭam kuṟaintatu
anda aṇeyile taṇṇi maṭṭam korenjadu
The water level in the damn has gotten lower.