Topic summary
IPA diacritics
Extracted from the Wikipedia article International Phonetic Alphabet.
Comparative degree
IPA diacritics may be doubled to indicate an extra degree (greater intensity) of the feature indicated. This is a productive process, but apart from extra-high and extra-low tones being marked by doubled high- and low-tone diacritics, ⟨ə̋,ə̏⟩, the major prosodic break ⟨‖⟩ being marked as a doubled minor break ⟨|⟩, and a couple other instances, such usage is not enumerated by the IPA.