negative prefix 無~ (without)

The Sino-Japanese prefix 無~ ('without, lacking, no'), attaching to nouns and noun-like stems to form negated concepts: 無責任 ('irresponsible'), 無料 ('free of charge'), 無関心 ('indifferent'), 無意味 ('meaningless'). Parallel to other negation prefixes 不~, 非~, 未~.