The phrase "wast in the power of" can be expressed in a number of different ways. Synonyms for this phrase include "under the control of," "at the mercy of," "subject to," "governed by," "dominated by," "under the sway of," and "enslaved to." All of these phrases suggest a situation in which one entity has a significant amount of power or influence over another. In some cases, this power may be legal or political, while in other cases it may be emotional, psychological, or practical. Regardless of the specific context, the phrase "wast in the power of" suggests a situation in which one entity is being controlled or dominated by another.