一いっ足そく飛とびに

adverb

in one leap; skipping intermediate steps; directly

Describes advancing to a higher level or stage without going through the usual intermediate steps. Often used with verbs like 進む, 上がる, or なる.

• 彼かれは平ひら社しゃ員いんから一いっ足そく飛とびに部ぶ長ちょうになった。

  He jumped straight from regular employee to department head.

• 初しょ心しん者しゃが一いっ足そく飛とびに上じょう級きゅう者しゃ向むけのコースを受うけるのは難むずかしい。

  It's hard for a beginner to jump straight into an advanced course.