Noun
full vowel (plural full vowels)
(phonology) a vowel that typically occurs in stressed syllables in a given language (not ruling out that may also occur in unstressed syllables)
Antonym: reduced vowel
Although some words like necessary are almost universally pronounced with the full vowel, older generations of Australians are relatively likely to pronounce these affixes with a schwa while younger generations are relatively likely to use a full vowel. Source: Internet
"Big y" gives the sound similar to "a" in the word "late" (full vowel sound—not like a diphthong), as in the word کے (ke—of). Source: Internet
The affixes -ary, -ery, -ory, -bury, -berry and -mony (seen in words such as necessary, mulberry and matrimony) can be pronounced either with a full vowel or a schwa. Source: Internet