To modify a sound by adding glottal constriction or a glottal stop, changing how it's produced in the throat.
From 'glottal' + '-ize' (suffix meaning to make or become). The verb form became necessary as linguists described active phonetic processes in living languages.
When you hear certain accents add a throat sound to consonants, they're glottalizing—and over centuries, small changes like this can transform how entire languages sound.
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