Sedan is a word that's used in English to describe a certain kind of four door car. A Latin equivalent of 'seat' is 'sedes'. The noun 'sedan' may or may not come from the Latin noun. Thus far, the origins of the word 'sedan', in terms of the car, aren't known.
Quad- which comes from the Latin word quattuor"four"
Ianua.
Quattuor
The root word of "portcullis" is "porta," which means gate or entrance in Latin.
The Latin word for twenty-four is vigintiquattuor - viginti representing twenty, quattuor representing four.
The word quadriceps is Latin for "four-headed"
Seat
loge
Seat.
Ferrum - Latin word for iron. Errō - Latin word for mistake or wander. Murrum - Latin word for wall or dam.
Quattuor pisces.
The English word door is derived from the Middle English dure or dor; or Old English duru, dorgate, meaning a gate or gateway. First used before the 12th century. Another word for door is portal, from the Latin porta, meaning gate.