How to say "noticeably" in Japanese

• めっきりJLPT N2approx.Common
  adverb (with と)The common, everyday choice for 'noticeably' as a visible change from before: weather turning cold, health fading, visitors decreasing. It measures the present state against an earlier one.
  めっきり寒さむくなった。↗

  It has become noticeably colder.
• ぐんと
  adverbCovers 'noticeably' when something jumps by a large margin — a sharp leap in degree rather than a gradual change. Typical contexts are marked growth or improvement, with skill, sales or figures shooting up.
  標高ひょうこうがぐんと高たかくなると呼吸困難こきゅうこんなんを感かんじる。↗

  In high altitudes, people find it hard to breathe.
• ひときわ
  adverbFor 'noticeably' as 'conspicuously': one thing standing out strikingly against its surroundings at a moment, not a change over time — a tower above the skyline, a performer outshining the rest.
  町並まちなみからひときわ高たかく昔むかしのお城しろが立たっている。↗

  High above the city stands the old castle.
• グーン
  adverb (with と)A mimetic word evoking something surging or stretching powerfully upward or outward; it chiefly fits 'noticeably' for that kind of marked surge, and is seldom the neutral word you want for ordinary noticeable change.
• ずんと
  adverbA less common adverb whose main reading is 'much' or 'far', stressing a large margin of difference; for 'noticeably' it is seldom the word you want, and another adverb usually serves better.

Use 「めっきり」 for a visible change from before, 「ぐんと」 for a sharp jump in degree, 「グーン」 for a powerful surge, 「ひときわ」 for standing out among others, and treat 「ずんと」 as a marginal 'much'.

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

• めっきりremarkably
• ぐんとremarkably
• ひときわconspicuously
• ぐーんremarkably
• ずんとmuch
• 目に見えてめにみえてvisibly
• ぼこっconspicuously (of a hole, bulge, dent, etc.)