A more thorough explanation:

bear, verb

1. To support or carry, for example, a heavy load.
2. To produce as yield, for example, interest on an investment.
3. To give as testimony, for example, to bear witness in court.

bearer, noun

One who possesses a negotiable instrument marked "payable to bearer" or indorsed in blank.

• He had to bear the weight of the heavy box and carry it up the stairs.
• The savings account will bear interest at a rate of 2% per year.
• The witness was asked to bear witness in court and give testimony about what they saw.
• The bearer of the check can cash it at the bank.

The examples illustrate the different meanings of the verb "bear." The first example shows "bear" as carrying a heavy load. The second example shows "bear" as producing yield or interest. The third example shows "bear" as giving testimony or bearing witness. The fourth example shows "bearer" as someone who possesses a negotiable instrument.