〔促進する〕promote;〔更に進める〕further;〔発展を促す〕encourage
- 日米間の友好を助長する
- promote friendship between Japan and the United States
- 平和を助長した功によりノーベル賞を与えられた
- He was awarded a Nobel Prize for his efforts to further the cause of peace.
- この状況が独立した商人階級の台頭を助長した
- This situation encouraged the growth of an independent merchant class.