Sentence:  The threat of effective anti-trust action , provoked by `` gouging the public '' through price increases not justified by cost increases , and fears of endangering relations with customers , Congress , the general public and the press , all operate to <WSD>keep</WSD> price increases in some relation to cost increases . 
Meaning of the word marked with <WSD> tags:  keep in a certain state, position, or activity; e.g., "keep clean"