the herdsmen of Gerar quarreled with the herdsmen of Isaac, saying, 'The water is ours!' So he named the well Esek, because they contended with him.
(New American Standard Bible)
And the herdmen of Gerar did strive with Isaac's herdmen, saying, The water is ours: and he called the name of the well Esek; because they strove with him.
(King James Version)