筋きん肉にく内ない

noun which may take the genitive case particle 'no', noun

intramuscular

Medical term used to describe something located or occurring within a muscle, such as an injection.

• この薬くすりは筋きん肉にく内ない注ちゅう射しゃで投とう与よされます。

  This medication is administered by intramuscular injection.