Sentence:  In May 1973 Honecker made another speech to the SED Central Committee, in which he appeared to want to <WSD>tighten up</WSD> the rules, as if his remarks in 1971 had been interpreted too liberally, but the VIIth Writers' Congress in November of the same year confirmed the relative freedom of the previous two years. 
Meaning of the word marked with <WSD> tags:  To become stringent and ungenerous.