This is the 103rd most frequent Spanish word.
posible
Capable of being done or achieved.
Used as an adjective to convey likelihood or possibility.
Es posible que llueva mañana.
It is possible that it rains tomorrow.
Used in a fixed expression to imply making an effort or doing one's best.
Haz lo posible por llegar a tiempo.
Do your best to arrive on time.
Used as an adjective to inquire about feasibility or attainability.