The spelling of the word "treadled" can be explained using the IPA phonetic transcription. The word is pronounced /ˈtrɛdəld/, with the stress on the first syllable. The "tr" sound is made by placing the tongue behind the teeth and blowing air through the mouth. The "e" sound in the first syllable is pronounced as the short "e" sound, and the second syllable has the short "i" sound, represented by the phonetic symbol /ɪ/. The final "ed" is pronounced with the syllabic /d/ sound, meaning that the "e" is silent and the "d" is the only vowel sound.
Treadled is the past tense and past participle form of the verb "treadle." The term is derived from the noun "treadle," which refers to a foot-operated pedal or lever used to control the operation of various machines, usually by alternating the motion of the feet up and down.
When used as a verb, "treadle" means to operate or control a machine by using a treadle. It specifically describes the action of moving one's foot up and down on a treadle pedal to control the functioning of a device or machine, such as a sewing machine or a loom.
The term can also be figuratively used to describe a rhythmic and repetitive motion resembling the action of using a treadle. It can be associated with repetitive or monotony-inducing actions or behaviors.
For example, in the context of weaving, one might say, "She treadled the loom to create intricate patterns in the fabric." In a metaphorical sense, one could say, "He treadled on the bicycle pedals, maintaining a steady pace throughout the race."
In summary, "treadled" is the past tense and past participle form of the verb "treadle," which refers to the act of operating a machine or device using a foot-operated pedal or lever.