1. Na-adjective (keiyodoshi), Noun which may take the genitive case particle 'no'

   a little; a few; small; slight; trifling; meagre; meager; narrow (margin)

   Usually written using kana alone

   わずかな誤りでも致命的な惨事につながるかもしれない。

2. Adverb (fukushi)

   only; just; merely; no more than

   Usually written using kana alone

Also written 纔か【わずか】wazuka