Remain (verb)

1. Stay behind while others leave; not depart.
2. Continue to be in the same state or condition; not change.

Origin:

Middle english: from old french remaindre, from latin remanere, from re- (expressing intensive force) + manere 'remain'. the original sense was 'stay behind', later 'continue to be in the same state or condition'.

Examples:

1. She remained in the office after everyone else had gone home.
2. The village remained untouched by the war.
3. The questions remain unanswered.
4. The controversy remains unresolved.
5. The treaty remains in effect after 50 years.