Sentence:  Presumably a cocktail party is expected to fulfill the host 's desire to get together a number of people who are inadequately acquainted and thereby arrange for bringing the level of acquaintance up to <WSD>adequacy</WSD> for future cooperative endeavors . 
Meaning of the word marked with <WSD> tags:  the quality of being able to meet a need satisfactorily: "he questioned the adequacy of the usual sentimental interpretation of the Golden Rule"