In a cartoon programme in American English, I heard Dora (the explorer) said "to solve the silliest /'siliest/ riddle". I remember it should be pronounced like /'silist/. I guess what Dora the explorer pronounced should be right, but I just don't know if it is true. If this is the case, should "busy" be pronounced like /biziest/? And other adj.s ended with "y"?
Thanks a lot.