P.T. Barnum posted a sign at his Great American Exposition that read "To the Egress," with an arrow pointing to a door. Any number of paying customers walked through the door, thinking that they were going to see some remarkable thing called "the Egress," only to find themselves on the street, where they had to pay another 25 cents to get back in.
I know what credulous, myopic, and pulchritude mean but I tried several things for each and still couldn't get the answer you were looking for. Corsair I thought was the pirate's ship... not pirate him/herself.
I went for naïve, which I think is close enough. Trusting, trustful, innocent, believing not allowed either. For some reason the aphasia kicked in and would not let me think of gullible.
Curious what you tried for credulous and pulchritude, cause i thought of it right away and cant think of other things that will fit (maybe because english isnt my language and dont think of many synonyms all at once)
When you hear "her condition will be ameliorated" it's not the health or comfort which will be made better - it's the condition being suffered from (illness or poverty) which will be lessened. I think "eased" is the best synonym.
I've always heard it used transitively. I checked a bunch of dictionaries--they all agreed that it could be used transitively, but split 50-50 on whether it could also be used intransitively.
"Incredulous" doesn't mean unbelievable, it means skeptical or unbelieving. Like, you wouldn't say "Your story about the UFO is incredulous," you would say "I am incredulous of your story about the UFO." That makes it a perfect antonym for "credulous," meaning gullible.
**edit - just seen ease dealt with below
And it is a verb too. I actually have never seen/heard of it as a noun (but looked it up and indeed can be a noun too)