Incipient is used to describe things which are beginning to come into being or which are to become apparent.

// The study clearly needs to be extended because the most recent data suggest incipient changes in the trends identified.

Arduous is an adjective used to describe something that is very difficult or strenuous.

// The gorgeous waterfall at the top of the mountain was worth the arduous hike.

To glower is to look or stare with sullen annoyance or anger. // Kelly glowered at me after I sided with Brenda in their dispute about the chores.

Ubiquitous is a synonym of widespread and describes things that are actually, or seemingly, seen or encountered everywhere.

// Though they were once a status symbol reserved only for those with considerable means, smartphones are now a ubiquitous technology.

Chapfallen (less commonly spelled chopfallen) is a synonym of depressed that means "cast down in spirit." It can also mean "having the lower jaw hanging loosely."

a decoy entry in a dictionary or encyclopedia, secretly planted among the genuine entries to catch other publishers in the act of copying content.

To describe someone as overweening is to say that they are arrogant and unduly proud. Overweening also disapprovingly describes qualities or desires, such as greed or ambition, that are seen as excessive.