English-language vowel changes before historic /l/

History and description of
English pronunciation
Historical stages
General development
Development of vowels
Development of consonants
Variable features
Related topics
This article contains phonetic transcriptions in the International Phonetic Alphabet (IPA). For an introductory guide on IPA symbols, see Help:IPA. For the distinction between [ ], / / and ⟨ ⟩, see IPA § Brackets and transcription delimiters.

In the history of English phonology, there have been many diachronic sound changes affecting vowels, especially involving phonemic splits and mergers. A number of these changes are specific to vowels which occur before /l/, especially in cases where the /l/ is at the end of a syllable (or is not followed by a vowel).