When I look up the word dangerous, the IPA spellings almost always show up as /ˈdānj(ə)rəs/
Maybe it's regional (Southern Ontario), but I don't encounter that pronunciation lot. And I probably use it myself less than 5% of the time.
I'd say, and maybe my IPA is off, 80% of the time I say /ˈdānj(ə)rɪs/. The 'ous' uses the ɪ sound, the same as in the word 'in'. And it's not subtle either. It's really really noticeable.
If I search 'dangerous definition' in Google, I get the above IPA, and a sound file. But the sound file pronounces the 'ous' closer to how I pronounce it, using ɪ as in 'in'.
In WordReference, it has the /ˈdānj(ə)rəs/ IPA spelling and a sound file that I think matches it. That sound file, of the word's US pronunciation, produces a pronunciation that is not one I hear often, as I said, maybe 5% of the time.
Both /ˈdānj(ə)rɪs/ and /ˈdānj(ə)rəs/ sound natural to me, but I only ever find the latter written, tho I mostly hear the former.
Also, I'm only focusing on the 'ous' part of the word, not the rest, because I there are several other pronunciations which of the first part of the word which sound natural to me also, so let us ignore them here.
Question :
Is it a sensible observation that the 'ous' in words like 'dangerous' are commonly pronounced as /ɪs/ and not /əs/ ? Or perhaps, the former is gaining favor ? I'm not sure if I can attach a sound file here, tho maybe I will upload my pronunciations to youtube, if there is no alternative.
EDIT:
I recorded myself saying it 3x with /əs/ and 3x with /ɪs/. I've never used soundcloud before and my file is 10 seconds long and if you don't use soundcloud the default appears to be autoplay, which might be considerably louder than my file, so listen closely, but not too closely.
https://soundcloud.com/dactyrafficle/dangerous?si=5623403900c9489789b1d4860060ebf6