THE FACT ABOUT DEFINITION THAT NO ONE IS SUGGESTING

There won't be any small pairs for tense/lax pairs such as /ʊ/ and /u/ in unstressed syllables, since they are in complementary distribution. They don't seem to be actually diverse phonemes."servus" (also usually pronounced "seavus") arrives most likely from Latin "servus", as some other people have previously identified. What I am not certain abo