Improve - develop into larger sized, bigger, or even larger; extend or get; "The condition grew far too substantial for me"; "Her small business grew rapid" bubble up, intumesce - shift upwards in bubbles, as from your effect of heating; also applied metaphorically; "Gases bubbled up from your earth"; "Marx's https://open.spotify.com/track/34R2ybXWvR8moYMvTNxLRZ?si=69c44df25f7d4fd5