12-Letter Words with _,E,F,I,R,R,T,T

• the physical property of a medium as determined by its index of refraction

• To format anew or again, generally erasing a previous format.

• The act by which something is reformatted.

• in the following part of a given matter, as in a document or speech

• a component or accessory added to something after it has been manufactured

• the act of adding a component or accessory to something that did not have it when it was manufactured

• provide with parts, devices, or equipment not available or in use at the time of the original manufacture

• fit in or on an existing structure, such as an older house

• substitute new or modernized parts or equipment for older ones

• a social club for male undergraduates

• people engaged in a particular occupation