humus

n [U] rich dark organic material formed by the decay of dead leaves, etc and essential to the fertility of soil 腐殖质.

humidity, humiliate, humiliating, humiliation, humility, humming-bird, humming-top, hummock, humor, humorist, humorous, humorously, humour, humour (US humor), humourless (US humorless), humourous, hump, humpback, humpbacked, humph, Hun, hunch, hunchback (also humpback), hunchbacked (also humpbacked), hundred, hundred-, hundredfold, hundreds of, hundredth, hundredweight, hung, hung parliament, hung-over, hunger, hunger after, hunger for, hunger march, hunger strike, hunger striker., hungrily,