Thridding is a rarely used word that refers to the action of passing a thread through a needle. Its spelling can be explained using the IPA phonetic transcription as /ˈθrɪdɪŋ/. The /θ/ represents the voiceless dental fricative sound found in words like "think" and "bath", while the /r/ indicates a rolled or tapped "r" sound. The /ɪ/ represents the short "i" sound as in "sit", and the /dɪŋ/ represents the ending syllable, including the voiced dental fricative sound /ð/, similar to the "th" in "this".
The word "thridding" is derived from the Old English word "þræddan", which means "to pass or penetrate". Over time, this word evolved into "thriden" in Middle English, and eventually became "thridding" by the 16th century. The term is primarily used in the context of sewing or weaving, referring to the action of threading a needle or passing a thread through fabric.