Pronunciation: [ˌɒn lˈat͡ʃ] (IPA) 
The phrase "on latch" is spelled with the IPA transcription of /ɒn/ and /lætʃ/. The first sound, /ɒn/, represents the vowel sound of "ah" that is common in British English. The second sound, /lætʃ/, represents the consonant combination of "l" and "ch," which creates a sharp, hissing noise. The phrase itself typically means that a door or window is not fully closed or locked, but is only being held shut by the latch.
The phrase "on latch" is an idiomatic expression used to describe the state of a latch or lock when it is not fully secured, thereby allowing for easy or immediate access or entrance.
In literal terms, a latch typically refers to a mechanical device, often found on doors or gates, that helps secure them by connecting or disconnecting two parts. When a latch is "on latch," it implies that it is in an unlocked or partially unlocked position, such that it can be easily opened or released. This state is often desired when expecting or facilitating an arrival or when temporarily granting access to a space.
However, metaphorically, "on latch" can also be employed to describe the availability or readiness of someone or something for attention, interaction, or engagement. In this sense, it suggests that a person or an object is readily accessible or approachable. Being "on latch" essentially means being open and ready to receive or engage in communication, collaboration, or any other form of interaction.
Overall, "on latch" denotes a state of partial or temporary openness, both literally and metaphorically, indicating easy access, availability, or receptivity.
The phrase "on latch" consists of two distinct words with separate etymologies:
1. On: The word "on" comes from Old English "an", which is derived from the Proto-Germanic root *ana. It has various meanings, but in the context of "on latch", it refers to the act of being fixed or situated upon an object.
2. Latch: The term "latch" comes from Middle English "lacchen", which is related to Old English "læccan" meaning "to seize" or "to grasp". It is thought to be derived from the Proto-Germanic root *lakjaną, which carries a similar meaning of "to catch" or "to get hold of".
When combined, the phrase "on latch" implies that something is secured onto a latch or fastened in a position where it can be opened or released by lifting or turning the latch.
