A "knit" fabric will stretch, either side to side and/or up to down, but a "woven" fabric will not stretch.
While Bondaweb can be used on shiny stretch fabric, it is not recommended you do so, as the results may not be as good due to the fabric's elasticity.
That will depend on the fabric. Some fabrics stretch in only one direction while other fabrics stretch in both directions (like polyester double knit). You will need to check your fabric to determine the maximum stretch.
Cotton or Linen
no it is not
Yes. That's why fat people can get into it.
diagonally
Twill is fabric that has a diagonal pattern. It is actually woven in such a way as to create diagonal "ribs" in the fabric itself (not just colored diagonal lines). Think of cordoroy - that is a fabric with a vertical (up and down) pattern woven into it. Twill is diagonal weaving. If a twill fabric has extra "give" so that it can expand (stretch), it is a stretch twill. Stretch twill often refers to the fabric having a small percentage of lycra/spandex in it, usually 2-4%.
Two way stretch jersey.
Tear-resistant?
to stretch is "étirer", and stretchable is "étirable". The stretchable blue-jeans fabric is often called stretch or tissu stretch.
Polyester is a material that fabric is fabricated from. Polyester can be knitted into fabrics that will stretch. Polyester also can be woven into fabrics that will not stretch. Polyester can be blended with other materials and fabricated into fabrics that will and will not stretch.