Sentence:  Their product had been <WSD>endorsed</WSD> by Good Housekeeping , the A. M. A. , and the Veterinary Journal , among other repositories of higher wisdom , and before much longer if you did n't have a cake of their soap in the john , even your best friends would think you did n't bathe . 
Meaning of the word marked with <WSD> tags:  guarantee as meeting a certain standard