noun, noun which may take the genitive case particle 'no'
half-read; partially read; left unfinished
Describes a book, document, or text that has been started but not finished reading. Often used with の to modify a noun, e.g., 読みかけの本 (a book one is in the middle of reading).
There is a half-read book on the desk.
I left the manga I was reading unfinished and went out.
Standard spelling using the common kanji 読 and kana for the suffix.
Alternate spelling using the kanji 掛, less common but still seen.
Compound of the continuative form of 読む (yomu, 'to read') and the suffix かけ (kake, 'half-...', 'in the middle of...').