Where does this definition of cardinal vowel come from?
This entry for cardinal vowel is sourced from GetWord Corpus, one of the dictionaries and corpora merged into Lughet.
Is cardinal vowel a noun, verb, or something else?
In this entry, cardinal vowel is tagged as 2n..
What is Lughet?
Lughet is a free trilingual dictionary covering nearly five million entries across Uyghur, Chinese, and English, drawn from more than ten source dictionaries and corpora.