得るは英語で
to earn

英語の定義

得る
1. v. (from 759) to get, acquire, gain, obtain, win, catch
2. v. (from 1073) q, following a verb in the attributive conjugation plus particle
3. v. (from 1073) q, by extension; in the form
4. suffix. (from 759) to be able to, -able
出来得る限り吾輩を入れてくれた主人の傍にいる事をつとめた。 - I tried to be at the side of the master who let me in as much as possible.