Persistently means continuing to do something steadily and determinedly, even when it's difficult or when obstacles get in the way. When you work persistently at a challenging math problem, you keep trying different approaches instead of giving up after the first attempt fails. A persistent scientist might spend years testing hypotheses before making a breakthrough.

The word captures that quality of sticking with something over time. A persistent cough keeps bothering you day after day. A persistent salesperson keeps calling back even after hearing “no” several times. Rain that falls persistently throughout the afternoon doesn't stop after a few minutes.

Persistent can describe both admirable determination and annoying stubbornness, depending on the situation. When your younger sibling persistently asks to play with you, interrupting your homework every five minutes, their persistence becomes frustrating. But when an athlete persistently practices a difficult skill until mastering it, that same quality becomes impressive.

The key idea is continuity: doing something again and again, steadily over time, without being easily discouraged. Someone who asks a question once isn't being persistent, but someone who keeps searching for answers through multiple sources over days or weeks definitely is.