 Borrowings include a few common words and word forms.For example, Welsh "ffenestr" is from Latin "fenestra", 'window'; "llyfr" is from "liber", 'book'; "ysgrif" is from "scribo", 'scribe'; and the suffix "-wys" found in Welsh folk names is derived from the Latin suffix "-ēnsēs".There are a few military terms, such as "caer" from Latin "castra", 'fortress'.