Scathe comes from Old Norse skaða ('to hurt, harm'), of Proto-Germanic origin (*skaþōną), from Proto-Indo-European *skēt- ('to harm, damage'). The historical chain includes Old Norse skaða and Proto-Germanic *skaþōną. Older glosses in the chain include "to hurt, harm" and "to harm, damage", which help explain the semantic range of the modern word. Morphologically, scathe is best read as borrowing, yielding an English verb and noun shaped by both form history and later usage. In current English it functions as a verb and noun, with the sense "to harm or injure, especially by scorching; harm or damage". English derivatives include scathing and scatheless; related forms include unscathed and scathing. The result is an English verb and noun whose etymology preserves the older forms while supporting the word's specialized modern meaning.