architrave
n.
1560s, from Italian architrave, from archi- "beginning, origin" (see archon) + trave "beam," from Latin trabem (nominative trabs) "beam, timber," from PIE *treb- "dwelling" (see tavern).
〔李〕n.主梁，框缘 [trave=beam] ←arch（i）-[GK] =chief，principal为首的，主要的