Through the Cambridge English Corpus When physical capital is complementary with human cash in output, returns on as well as demand from customers for competencies rise bubble up, intumesce - transfer upwards in bubbles, as within the influence of heating; also employed metaphorically; "Gases bubbled up from the earth"; "Marx's https://open.spotify.com/track/34R2ybXWvR8moYMvTNxLRZ?si=69c44df25f7d4fd5