進すすんで

adverb

voluntarily; willingly; of one's own free will

Used when someone does something proactively, without being asked or forced. Often implies a positive, eager attitude.

• 彼かれは進すすんでその仕し事ごとを引ひき受うけた。

  He willingly took on that task.

• 進すすんで手伝てつだってくれてありがとう。

  Thank you for helping out of your own free will.