The spelling of the word "most twilit" is pronounced as /moʊst ˈtwaɪlɪt/. The word "twilit" is a variation of the word "twilight", meaning dimly lit or dark. The -ed suffix is replaced with -it to create the adjective form. Adding "most" before "twilit" emphasizes that something is the most dim or dark it can possibly be. This uncommon word is usually used to describe atmospheric settings, and is a great addition to any writer's vocabulary.
The word twilit is the adjective form of the noun twilight, which refers to the period between daylight and darkness, or the dim light just before nightfall.
The etymology of twilight comes from Old English, where it was spelled twi meaning two and light meaning brightness. So, twilight literally means two lights or the mingling of light and darkness.
However, most twilit seems to be an unusual phrase and not commonly used. It is important to note that English adjectives usually do not have a superlative form ending in most. Instead, it is more common to use twilight in comparisons such as duskier or more twilight-like.