undulate
‘to move in waves’
Lexical development traced from the Tamil root:
E. undulation < Med.Lat. undulatio < La.Lat. undulatus ‘wavy, undulated’ < undula ‘wavelet’ < unda ‘a wave’ < unda- < uhn < wed- < Tamil utakam
undulate
English words derived from Tamil utakam connoting 'water'