This is the 342nd most frequent Hebrew word.
להישאר
To remain; to stay.
The word 'להישאר' is used here to express the act of remaining in place (staying at home).
אני מעדיף להישאר בבית הערב.
I prefer to stay home this evening.
The word 'להישאר' signifies maintaining a position (remaining under the umbrella).
אם יורד גשם, עדיף להישאר מתחת למטרייה.
If it's raining, it's better to stay under the umbrella.
The term 'להישאר' conveys the continuity of a state or condition (staying in shape).