Something that is boring is dull and uninteresting—maybe even nap inducing. Something that is humdrum is especially boring for its lack of variety (unlike your synonym-rich vocabulary!). Fun though it may be to say, humdrum emphasizes monotony and the drone of the everyday. This dreary adjective commonly describes recurring activities or routines, or even the monotony of life itself.
To helm something, such as a creative project or a place of business, is to steer or direct it. The suggestion is of one helming or steering a ship, an activity so named for the wheel or steering apparatus of a seagoing vessel—the helm. You may hear of someone helming a department or agency, a newsroom, or a kitchen in popular restaurant. But most often, helm is used in the entertainment industry in discussion of the director, who steers the production on a (hopefully not choppy) course.
The adjective adverse implies antagonism and opposition. It emphasizes the idea of misfortune and is often used to describe circumstances or events that are harmful to health and well-being. For instance, you might hear of adverse effects of pollution or adverse consequences of a decision. This decidedly unfriendly adjective is related to the noun adversity, “an unfortunate event or circumstance” or “unfavorable fortune or fate.”