missing audios for pronunciations in Merriam-Webster

An important feature of the free online version of the Merriam-Webster dictionary is that it usually gives the pronunciation of the word. There are cases where is doesn’t do so, for no apparent reason. (Maybe they just haven’t gotten around to it yet.) Anyway, a nice workaround is the use the ‘NatualReader’ app in that case.
Such cases:
(total of 10 so far, randomly encountered)
Here is the link to the ‘NaturalReader’ app.
[errors and omissions]
[missing audio pronunciations]
[text to speech]