#voiced interdental fricative

linguisticmaps:

The voiced interdental fricative - [ð]. It mostly occurs as the voiced counterpart of [θ] in the languages that have it, or as an allophone of /d/, like in Spanish. This is the sound present in English TH like in THat, or THe, or moTHer. In many dialects of English this sound is substituted by [d], [v] or [z], like London English, Philadelphia English, African American Vernacular English, North New Zealand English, Irish English.