無む作さく為い

noun which may take the genitive case particle 'no', na-adjective, noun

random; unintentional

Used for actions or selections made without deliberate intent, often in formal or statistical contexts. The 'unintentional' nuance is less common than 'random'.

• 無む作さく為いに選えらんだ数すう字じで宝たからくじを買かった。

  I bought a lottery ticket with randomly chosen numbers.

• 調ちょう査さでは無む作さく為いに抽ちゅう出しゅつした1000人にんにアンケートを行おこなった。

  In the survey, we conducted a questionnaire with 1000 randomly selected people.