Pronunciation: [ɹˈat͡ʃ] (IPA) 
The word "ratch" is spelled phonetically as /rætʃ/. The first sound is the "r" sound, as in "rat", followed by the short "a" sound, as in "cat". The "tch" cluster represents the sound made when the letters "t" and "ch" are combined. This sound is often heard at the end of words such as "match" and "catch". Although not a commonly used word, "ratch" may be used to describe a notch or groove on a device for locking it into place.
Ratch has multiple meanings depending on the context in which it is used. As a verb, ratch means to gradually increase or decrease by incremental steps or intervals. It often implies a jerky or not smooth motion, similar to a clicking or ticking sound. The term is commonly associated with mechanical devices or tools, where it refers to the operation of a ratchet mechanism that allows movement in only one direction, locking in the other.
As a noun, ratch primarily refers to a dog or gear tooth in a ratchet mechanism. A ratchet is a toothed wheel or bar with teeth that act as catches, allowing only unidirectional rotation. The ratch or ratchet plays a crucial role in this mechanism, preventing reverse or backward movement.
Additionally, ratch can be used as a slang term meaning to engage in promiscuous or sexual activity. This meaning is relatively informal and might not be recognized or understood universally.
Overall, ratch encompasses the concepts of incremental movement, mechanical gears, and engaging in promiscuous behavior, but its usage and meaning can vary depending on the specific context.
In clock and watch making, a small arm or bar, one end of which abuts against a toothed wheel, called a ratchet-wheel, whose use is either to communicate motion or to prevent backward motion-in the former case being called a click or paul, and in the latter a detent; in mech., a bar having angular teeth, into which a paul drops to prevent a machine being reversed when in motion.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
The word "ratch", perhaps referring to a female canine, is not widely recognized in the English language. It might be a regional or colloquial term that does not have a well-documented etymology. However, there is another similar word, "ratchet", which has a detailed etymology. "Ratchet" comes from the Middle French word "rocquet", meaning a ratchet or a pawl. Its ultimate origin lies in the Germanic word "rocko" or "rocco", which referred to various mechanical devices. Over time, the term "ratchet" began to be used metaphorically, and it became associated with the clicking sound produced by the pawl in a ratchet mechanism.
