*H1wes-

from EIEC
*H1wes- "moist, especially of the ground or plants"
vestikatu "to offer libation" Umbrian
wo:s "juice, broth" Old English
waas "layer of mist of fine drops" New Dutch
wasal "moist ground" Old High German
vasa "forest with wet ground and blue clay" Latvian
ievasa "moisture, tree sap" Latvian
va:s "trouble, difficulty"
(< "caused by bad weather") Old Norse

What is that laryngeal H1 doing there? And how do you account for the
long vowels?

Torsten