noun, noun which may take the genitive case particle 'no'
partially consumed drink; half-finished drink
Refers to a drink that someone has started but not finished. Often used when talking about leaving a drink unfinished or finding a leftover drink.
テーブルの上に飲みかけのコーヒーがあった。
There was a half-finished cup of coffee on the table.
飲みかけのペットボトルをそのまま置かないで。
Don't leave a partially drunk plastic bottle just sitting there.
Compound of the verb stem 飲み (from 飲む, 'to drink') and the suffix かけ, indicating an incomplete action. The suffix かけ derives from the verb 掛ける (to hang, to suspend), implying something left in an unfinished state.