Heavy

drückend

(of weather:hot and humid)

dunkel

(serious)

ernst

(serious)

finster

(serious)

groß

(of a person: doing the specified activity more intensely than most other people)

mächtig

(of rate of flow: high)

schwer

(having great weight)

schwer

(of rate of flow: high)

schwer

(of a person: doing the specified activity more intensely than most other people)

schwer

(laden to a great extent)

schwül

(of weather:hot and humid)

stark

(slang: good)