空くうを掴つかむ

expression, godan verb (-mu)

grasp at the air; try to catch the wind

Idiomatic expression meaning to attempt something impossible or futile, like trying to grab empty air.

• 彼かれの説せつ明めいは抽ちゅう象しょう的てきすぎて、空くうを掴つかむようなものだ。

  His explanation is too abstract; it's like trying to grasp at the air.

• そんな計けい画かくは空くうを掴つかむに等ひとしい。

  That plan is as good as trying to catch the wind.