This is the 11326th most frequent Russian word.
держись
"Hold on," "hang in there," or "stay strong."
Here, 'держись' is used to encourage someone to stay strong and persevere during hard times.
Держись, всё будет хорошо.
Hold on, everything will be fine.
Here, 'держись' is used in the literal sense, telling someone to physically hold onto something for support.
Держись за поручень в автобусе.
Hold on to the handrail in the bus.
Here, 'держись' implies adhering to or following a specific idea or plan.