scratch
noun
skrætʃ 
skrætʃ mark/cut
1 [countable] a mark, a cut or an injury made by scratching somebody's skin or the surface of somethingHer hands were covered in scratches from the brambles.a scratch on the paintworkIt's only a scratch (= a very slight injury).He escaped without a scratch (= was not hurt at all).sound
2 [singular] the unpleasant sound of something sharp or rough being rubbed against a surfacewith your nails
3 [singular] the act of scratching a part of your body when it itchesGo on, have a good scratch!Idioms
from scratch
1 without any previous preparation or knowledgeI learned German from scratch in six months.He built the orchestra up from scratch.2 from the very beginning, not using any of the work done earlierThey decided to dismantle the machine and start again from scratch.up to scratch
as good as something/somebody should be
Synonym
satisfactoryHis work simply isn't up to scratch.It'll take months to bring the band up to scratch.