得る

What does 得る mean in English?

1. to get; to earn; to acquire; to procure; to gain; to secure; to attain; to obtain; to win(v1, vt)
2. to understand; to comprehend(v1, vt)
3. to receive something undesirable (e.g. a punishment); to get (ill)(v1, vt)
4. to be able to ..., can ...(aux-v, v1, vt)