How to say "broaden" in Japanese

• 広げるひろげるJLPT N2approx.Common
  ichidan verb, transitive verbThe all-purpose verb for the core senses of 'broaden': physically spreading something out, such as a map or cloth, and figuratively broadening or expanding knowledge, experience, horizons, or the scope of an activity.
• 広めるひろめるJLPT N2approx.Common
  ichidan verb, transitive verbFor 'broaden' this is seldom the word you want: it is used chiefly for making ideas, teachings, or influence widespread or widely known — extending their reach — rather than for physically widening things.
  旅行りょこうは人ひとの視野しやを広ひろめる。↗

  Travel broadens one's horizons.

For the everyday senses of 'broaden' — making something physically wider or expanding its scope, knowledge, or horizons — 「広げる」 is the natural choice; 「広める」 is really for spreading ideas, teachings, or influence so they become widespread.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 広げるひろげるto spread
• おっぴろげるto spread
• 広めるひろめるto broaden