Pronunciation: [mˈɔːta͡ɪzɪz] (IPA) 
The word 'mortises' refers to a slot or recess in a piece of wood where another part, such as a tenon, is fitted to form a joint. It is pronounced as /ˈmɔːtɪsɪz/. The spelling is derived from its etymology, which comes from the Old French word 'mortaise', meaning a mortise or a hole. This word was borrowed from the Late Latin word 'mortīcium', which referred to a mortise or a hole made to receive a tenon, a keyhole, or a mortuary.
A mortise refers to a rectangular cavity or notch that is created in a piece of wood or other material to receive a tenon. It is a woodworking term that describes a specialized slot or hole that allows for the joining of two pieces of wood to form a sturdy and secure joint. Mortises are typically cut into a horizontal piece of wood, commonly known as the "mortise piece," and are designed to receive a tenon or projecting tongue from a perpendicular or vertical piece of wood, often referred to as the "tenon piece."
Mortises can be created using various methods, including chiseling, drilling, or routing. The depth and size of a mortise can vary depending on the specific application and the dimensions of the tenon it is intended to receive. Mortises are commonly used in joinery techniques such as mortise and tenon joints, which have been employed in woodworking for centuries due to their strength and durability.
In addition to woodworking, the term "mortises" can also have a broader meaning in other domains. For instance, in architecture or construction, it may refer to rectangular recesses or openings created in a wall or other structural element to accommodate windows, doors, or other fixtures.
The word "mortise" originated from Middle English "mortays" or "mortaysen", which came from Old French "mortaïs" or "mortoise". This Old French term was derived from Late Latin "mortāre", meaning "to pound or grind". In woodworking, a mortise refers to a cavity or hole cut into a piece of wood to receive a tenon, forming a joint. Over time, the spelling of the word evolved from "mortaise" to "mortise" in English.
