From the Cambridge English Corpus When physical capital is complementary with human cash in production, returns on and also the need for abilities rise bubble up, intumesce - move upwards in bubbles, as from your result of heating; also employed metaphorically; "Gases bubbled up through the earth"; "Marx's Thoughts have https://open.spotify.com/track/34R2ybXWvR8moYMvTNxLRZ?si=69c44df25f7d4fd5