Complex sentence: By the later tenth century, the newer letter "k" (which was rarely used in Latin) was starting to replace this spelling: "kēron"'to turn around' (mod. "keren").
Split into simpler sentences: By the later tenth century, the newer letter "k" (which was rarely used in Latin) was starting to replace this spelling. Example: "kēron"'to turn around' (mod. "keren").