the letter ð that was used in Old English to represent the sounds /θ/ and /ð/ and later written as th. This letter is now used as a phonetic symbol for the sound /ð/, as in this. * ð(古英语中用以表示 /θ/ 和/ð/ 音的字母,后写作 th)Word Originfrom Danish edh, perhaps representing the sound of the letter.