inefficient
Describes processes, methods, or systems that waste time, effort, or resources.
This method is inefficient.
I want to reduce inefficient meetings.
Antonym meaning 'efficient'.
Focuses on wastefulness or futility, while 非効率的 emphasizes lack of efficiency in a process.
非効率的 describes something wasteful or inefficient, the direct opposite of 効率的.
Compound of 非 (hi-, 'non-') + 効率的 (kōritsuteki, 'efficient').