Pronunciation: [hˈɪt͡ʃ ˈɒn] (IPA) 
The correct spelling of the phrase "hitch on" is /hɪtʃ ɒn/. The word "hitch" means to attach, fasten, or join, while "on" indicates the connection of something to another object or surface. The sound /h/ at the start of "hitch" indicates the emphasis on the beginning of the word, while the /tʃ/ sound is formed by combining the "t" and "sh" sounds. The "o" in "on" is pronounced as "ah" due to the unstressed syllable.
The term "hitch on" is colloquially used to describe attaching or joining something onto another object, entity, or situation. This phrase conveys the idea of connecting or becoming part of a larger whole. It implies the act of fastening or linking something in a way that it becomes an integral component or element of the overall structure or system.
In a literal sense, "hitch on" can refer to tangibly affixing or connecting one object to another. For instance, in the context of towing a trailer, one may "hitch on" the trailer to a vehicle by attaching them with a hitch or a coupling mechanism. Similarly, in a figurative sense, "hitch on" can describe the process of associating or affiliating oneself with a person, group, or cause. It suggests becoming involved in or becoming an integral part of something.
Furthermore, "hitch on" can also denote the act of taking advantage of someone or something for personal gain, often with a negative connotation. It implies the exploitation or dependency on another entity for personal benefit.
Overall, "hitch on" encompasses various connotations depending on the context in which it is used. It signifies the action of connecting, affiliating, or attaching oneself or an object to something else, often with the intention of integration or gaining benefits.
The phrase hitch on does not have a specific etymology as it is an idiomatic expression and does not consist of distinct words. However, if you are referring to the word hitch on its own, it can be traced back to Old English.
The word hitch originated from the Old English word hycgan, which meant to think or intend. Over time, it evolved into hitcha, which referred to a sudden stop or jerk. Eventually, it transformed into the Middle English hichen and then into the modern form hitch.
In its current usage, hitch commonly means to attach or fasten something temporarily, as in to hitch a trailer to a car. It can also refer to a small problem or obstacle, such as a hitch in the plan.
