Yett

They rode into the outer courtyard, through the muckle faulding yetts and aneath the auld portcullis; […]

The outer yett was closed, and a torch burned in a socket set in the gatehouse wall beside the archway. A guard stepped up, peered through the yett at Guillaume, and nodded to someone off to the side.

[A] yett was in use along with the portcullis. At Doune we have an example of an existing yett, set about a foot behind the portcullis grooves; of course, it is impossible to say whether the two were contemporary, but it seems[…]

... yett was solid . At Doune, Perthshire, dating from the latter years of the fourteenth century, the main gateway was defended by a portcullis and a yett at the entrance, and, apparently, by another yett, […]

So when the L. Chauncellor or Keeper passeth anie patent by imediate warrant, yett the fees of the Clerke of the Seale and Signett are ordered to be awnswered, and yett theie doe noething for them.