na-adjective
impractical; unpractical
Describes ideas, plans, or methods that are not realistic or workable in practice. Often used in formal or critical contexts.
その計画は非実際的だと批判された。
The plan was criticized as impractical.
非実際的なアイデアばかり出しても前に進まない。
Just coming up with impractical ideas won't move things forward.
Formed from 非 (negative prefix) + 実際的 (practical). The derivation is transparent, but the exact historical origin is uncertain.