SMOULDER

v. burn; seethe, simmer, chafe, rage, fume, foam, boil, stew, fester, Colloq get hot under the collar, get (all) steamed up, see red, US do a slow burn, get (all) burnt up The fire continued to smoulder, then flared up again a week later He has been smouldering ever since his wife confessed she was going out with another man.