air fhichead

== Scottish Gaelic == === Numeral === air fhichead twenty- ==== Usage notes ==== Used behind the numerals for 1 - 19 and noun, if any. trì - three trì air fhichead - twenty-three trì leabhraichean air fhichead - twenty-three books trì deug air fhichead - thirty-three (vigesimal system, literally twenty-thirteen)