Fretty, Fretted 

Fretté, Fretten,  Interlaced, Interfretted, Braced, Brazed

1. The division of the field composed of six, eight, ten or more lines crossing the shield bendways dexter and sinister, and interlacing or fretting each other. The term is by some more strictly understood to contain six each way crossing one another which, if more, should be specified. Neve or newe were sometimes used for fretty in ancient works.

Compare with Treilled, Latticed  and Portcullised

Gu three interlaced crescents arg

2. Charges or ordinaries, interlaced one with the other are termed fretted, as interlaced crescents, interlaced  keys, etc.

Another term for fretted was entangled, which has now been superseded.

a chevron fretted with a barrulet

Barry lozengy arg and az
Barry per fret, better blazoned barry lozengy. It is also known as barry bendy lozengy, barry lozengy counterchanged,  barry point in point or counter-triangle: A partition of the field  barways and bendways, both dexter and sinister, forming lozenges divided into alternating tinctures. It is also sometimes blazoned barry indented, the one into the other.