stagnateதேங்கி நில்tēṅki nil(teengi nillu)(5 intr)be or become motionless or stagnant, without moving or flowing; accumulate, as water; be idle; exist in a changeless situation
Usage:
மழைத்தண்ணீர் ஒரு வாரமாகத் தேங்கி நிற்கிறதுmaḻaittaṇṇīr oru vāramākat tēṅki niṟkiṟatu
maḻe taṇṇi oru vaaramaa teengi nikkradu
The rain water has been pooling there, stagnating, for about a week now.