'non-intervocalic' originates from Modern English, specifically formed from the negative prefix 'non-' (from Latin 'non') combined with 'intervocalic', where 'inter-' meant 'between' and 'vocalic' derives from Latin 'vocalis' meaning 'of the voice'.

'non-intervocalic' developed by attaching the prefix 'non-' to 'intervocalic'. 'Intervocalic' itself comes from Latin components 'inter-' + 'vocalis' → Old/Middle English/Modern English stages produced 'vocal' and the adjectival form 'vocalic', yielding 'intervocalic' in linguistic usage; the negated form 'non-intervocalic' is a later English formation.

Initially the element 'intervocalic' meant 'occurring between vowels'; the prefixed form 'non-intervocalic' has meant 'not occurring between vowels' since its creation and has retained that specific technical meaning in linguistics.