Wiktionary
vb. (present participle of seize upon English)
Usage examples of "seizing upon".
A sneer twisted the mouth of each of the two Veltopis-makusians as they whipped out their rapiers and leaped toward the ape-man, ignoring for the moment the Trohanadal-makusian, who, seizing upon the opportunity thus afforded him, threw aside his iron rod and snatched a rapier from the side of one of the drunken noblesa substitution of weapons that would render Komodoflorensal a dangerous opponent anywhere in Minuni, for there was no better swordsman among all the warlike clans of Trohanadalmakus, whose blades were famed throughout Minuni.
With frightened eyes Skalgr stared around, seizing upon the two horses with separate and distinct shocks and coming to rest upon Brak.
Into the midst of a family party he sprang, seizing upon an old man.
They all rushed through preparations, seizing upon the project with pitiful eagerness.