The Hittite word wa-a-tar
Word wa-a-tar
IPA wātar
Meaning water
See also Proto-Indo-European: *wódr̥/wudr̥ ‘water’
Hittite: ua-a-tar ‘water’
C. Luwian: wa-a-ar-ša ‘water’
Palaic: wa-at-ta-na ‘water’

Other words that might be of interest
lu-li-iš ‘pond, lake, spring, well, basin’, a-ru-na- ‘sea’, e-kan ‘cold, frost, ice’, ḫe-e-u- ‘rain’, du-u-ur ‘urine’, še-e-ḫur ‘urine’, ḫa-pa-aš ‘river’