The zealous volunteer organized the community cleanup with boundless energy.

The judge cautioned the jury that a zealous witness whose testimony clearly favored one side might compromise the integrity of the trial.

The zealous witnesses arrived early to make sure nothing went unnoticed at the hearing.

Her over-zealous attempts to help often ended up causing more problems than they solved.

His zealousy turned small flirtations into full-blown arguments.

She defended the project zealously during the board meeting, refusing to concede any point.

Her zealousness for environmental conservation inspired the whole community to act.

The committee was surprised by the volunteers' zealousnesses, which ranged from late-night campaigning to daily outreach efforts.