Was

[первое и третье лицо, единственное число прошедшего времени] от глагола be

Большой англо-русский словарь

Was

Etymology: Middle English, from Old English, wæs, 1st and 3d singular past indicative of wesan to be; akin to Old Norse vera to be, var was, Sanskrit vasati he lives, dwells past first and third singular of be

Merriam-Webster's Collegiate Dictionary