有益
ゆうえき · yuueki · JLPT N1 · na-adj
beneficial
💰 有益 = 有 (have) + 益 (benefit): having benefit; sounds like 'yo, you-E-key' gaining profit
益 means benefit or gain, as in 利益 (profit). 有益 literally means 'has benefit', so it describes anything that is good for you or pays off.
有 — hand 𠂇 + moon/meat 月
Originally depicted a hand holding a piece of meat (月 here is the 'meat' radical, not moon), expressing the idea of possessing something. Over time the meaning broadened from 'to hold/possess' to the general sense of 'to have' or 'there is/exists'.