無作為(むさくい)

むさくい
noun, na-adjective
random; at random
formalacademicsciencedescriptive
1. random; at random
Chosen without any intention or pattern, so that every item has the same chance; the technical sense used in surveys and statistics.
無作為(むさくい)に選(えら)ぶ。
To choose at random.
名簿(めいぼ)から百人(ひゃくにん)を無作為(むさくい)に抽出(ちゅうしゅつ)した。
We drew one hundred people at random from the list.
調査(ちょうさ)は全国(ぜんこく)から無作為(むさくい)に選(えら)ばれた二千人(にせんにん)を対象(たいしょう)に行(おこな)われた。
The survey covered two thousand people chosen at random from across the country.

無(む) (without) + 作為(さくい) (deliberate action). Mostly used in surveys, statistics, science and law; the everyday word is ランダム or 適当(てきとう)に.

Common collocations

Similar words

  • ランダム: random; the casual loanword
  • 適当(てきとう)に: any old way, without thought; carries a hint of carelessness that 無作為(むさくい) lacks

Related Words

Compare: 適当(てきとう) (any old way, without thought)
general
Added 2026.10.8 9:21 · Revised 2026.10.8 9:24
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