Definitions for "Consonant digraph"
Keywords:  gnat, sound, consecutive, chair, rough
a combination of two consonant letters representing a single speech sound, as gn for /n/ in gnat or gh for /f/ in rough. Cp. blend.
consists of two consonants that together represent one sound (sh, ch, th, wh)
Two consecutive consonants that make one sound. Examples: fish, they, chair, etc.