i didn't see it in the lexicon, but is there a word for "shade" ? i know there's shadow and dark, but shade is more specific
There's two. There's Horrl, and Maema. They both refer to very different things.
Horrl is understorey. It's where shade-tolerant plants like fuchsia, yew, and moss grow best. It's where small animals live, and where ThunderClan likes to hunt. It's shaded by definition, and thus is usually used as the -Shade suffix you see in the books.
Mapleshade's name, Gessqahorrl loses a LOT of meaning in English. A more accurate translation would be Sycamore Understorey. She lurks in the undergrowth of a sycamore patch, leaping out to strike!
Maema is the shade provided by things that block out the sun, which is a relief on summer days. It's a word related to light and darkness, not to any specific location, which is probably the word you were looking for.
This is the one more often used in prefixes, and by RiverClan and WindClan which don't have understories in their territories. Shadepelt of RiverClan was named Maemaborrl, not Horrlborrl. I also renamed Shadepelt 2, who is now her grandchild in BB, their name is now Shademuzzle. Maemamawa.
New words here:
Sycamore (Acer pseudoplatanus) = Gessqa
Muzzle (The entire mouth area, chin, snout, and mouth) = Mawa